Bereshit 15 – One Prophecy or Two/2

Relationship Between the Sections of Bereshit 15

Exegetical Approaches

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Overview

In trying to untangle the many difficulties raised by our chapter, commentators are led to question the relationship between and chronology of its components.  Many, following the lead of Seder Olam Rabbah, suggest that the chapter is comprised of two disparate events, a promise of progeny which was given after the War of the Five Kings, and the Covenant of the Pieces which was made much earlier, when Avraham was 70. This has the advantage of providing a single solution to most of the chapter's difficulties. Nonetheless, as the newly posited ordering makes many assumptions and creates new questions, many other exegetes prefer to maintain the unity of the chapter, and instead give local answers to the various questions.

Two Non-chronological Events

Chapter 15 comprises two distinct prophecies.  The vision described in the first six verses of the chapter is in chronological order and took place after the Battle of the Five Kings, while the rest of the chapter recounts a separate prophecy (ברית בין הבתרים) which happened earlier when Avraham was 70.

Sources:Mekhilta DeRabbi YishmaelBo 14About Mekhilta DeRabbi Yishmael Shemot, Seder Olam Rabbah13About Seder Olam Rabbah, Baraita of 32 MiddotMiddah 32About Baraita of 32 Middot, RashiBereshit 14:4-5Bereshit 15:1,3,6, 13Shemot 12:40About R. Shelomo Yitzchaki,¹ RashbamBereshit 15:1,5, reconstructed from MS Munich 252MS Oxford 271/8cited by Ms. Parma 2342/1Bereshit 22:1Shemot 12:40-41About R. Shemuel b. Meir, Chizkuni15:1-7About R. Chizkiyah b. Manoach, Ba'alei HaTosafotShabbat 10bAvodah Zarah 9aAbout Ba'alei HaTosafot

400 or 430 years? The motivation for this approach is the discrepancy in the account of the length of the Egyptian exile in Bereshit 15:13 (400 years) and Shemot 12:40-41 (430 years). This position maintains that the 400 years started from the birth of Yitzchak, while the 430 count began thirty years earlier, at the Covenant of the Pieces.  Since Avraham was 100 when Yitzchak was born, the Covenant must have occurred when he was 70.²

Achronology – As Bereshit 12 is explicitly dated to the 75th year of Avraham's life, this approach is forced to say that the Covenant of the Pieces is written out of order.  Rashbam, Chizkuni, and Tosafot point out that, nonetheless, the first part of the chapter is in its chronological place, as both the phrase "אַחַר הַדְּבָרִים הָאֵלֶּה" and Avraham's fear³ serve to connect it to the war of the five kings in the previous chapter.

Chronology of Bereshit 12-14

• Chronological – This position works best if one assumes that Chapters 12-14 follow chronologically and occurred at some point after Avraham was 75.  This appears to be the way Seder Olam Rabbah reads the verses,⁴ as the midrash suggests that Avraham's arrival in Canaan, the famine, and the war all took place in the same year, when Avraham was 75.⁵
• Achronological – Rashi, Rashbam,⁶ and Tosafot Shabbat 10b,⁷ though, assume that the War of the Five Kings took place when Avraham was 74.⁸
• This dating is extremely difficult as it suggests that Avraham was in Canaan not only at 70 for the Covenant, but also at 74 for the war.⁹  Such a reading, though, is not compatible with the verses which present the events of Chapters 12-15:6 as causal and sequential.¹⁰ If one dates the war to Avraham's 74th year, one must similarly date Chapters 12-13 earlier, which creates total chronological havoc in the chapters.¹¹

"וְאַבְרָם בֶּן חָמֵשׁ שָׁנִים וְשִׁבְעִים שָׁנָה בְּצֵאתוֹ מֵחָרָן" – Bereshit 12:4 suggests that Avraham first left to Canaan at 75.   As such, this position must assume either that the Covenant took place out of Israel, or, as Seder Olam Rabbah asserts, that Avraham went to Israel at 70 but then returned to live in Charan for five years.¹²  Each assumption is difficult:

• Occurred out of Israel – Chizkuni points out that the phrase, "לָתֶת לְךָ אֶת הָאָרֶץ הַזֹּאת" assumes that the Covenant is taking place in Israel rather than outside.‎¹³
• Returned to Charan – Ralbag questions this on several grounds. He finds it unfathomable that once Avraham was in Israel and was promised the land, that he would have left unless he found himself in dire circumstances (such as famine).¹⁴ In addition, he points out that Bereshit 11:31 suggests that Avraham went from Ur Kasdim (rather than Canaan) to Charan.¹⁵

Why write the story achronologically? This position must explain why the Torah did not write about the Covenant in its chronological place. Rashbam and Chizkuni suggest that the story is written out of order in order to juxtapose the promise of land with the promise of progeny mentioned in the first part of Chapter 15.  This suggestion, though, is unsatisfying as there are multiple places where Hashem promises Avraham land or seed, and not always together.

Why make a covenant now? This approach would suggest that as this is the first time that Hashem is promising Avraham the land, He accompanies the promise with a covenant thereby both strengthening and explaining the conditions of the promise.

Night or day? Rashbam points out that the difference in time between the two halves of the chapter is easily explained if one posits that the two are distinct prophecies, occurring years apart.

Introductory formula – "אֲנִי ה'‏" – Since verse 6 is the beginning of a new prophecy, rather than the continuation of Hashem's words from verse 1, Hashem's introduction makes sense.¹⁶  Moreover, if the Covenant took place when Avraham was 70, it is possible that this was the first time that Hashem spoke with Avraham, making such an introduction even more understandable.

"וַיֹּאמֶר אֵלָיו" – The language of "וַיֹּאמֶר אֵלָיו" at the beginning of the Covenant of the Pieces is difficult for this approach as it appears to indicate that this story continues from where the preceding narrative left off.  Were it an opening of a separate story, one would have expected the standard opening formula of "ויאמר ה' אל אברהם" to identify the participants in the conversation.

Avraham's doubts – "הֵן לִי לֹא נָתַתָּה זָרַע" – Chizkuni suggests that even though Avraham believed Hashem's earlier promises that he would have a child, he feared that due to his old age and presumed imminent death, the child would be raised by his servant, Eliezer and, as such, it would really be Eliezer who inherited.

Avraham's doubts – "בַּמָּה אֵדַע כִּי אִירָשֶׁנָּה" – Chizkuni asserts that according to this chronology, since Hashem had just promised Avraham land, but had not yet promised him progeny, Avraham's question is a legitimate one.  He is merely asking that if he dies barren, how is the land to be his inheritance?¹⁷  Moreover, according to this position, this is the first (not the third) promise of land, and so it is logical that questioning comes here rather than elsewhere.

Belief versus doubt – The inconsistency of tone between verse 6 where the text relates that Avraham "believed in Hashem" and verse 8 where Avraham questions Hashem is not problematic for this position since there is no continuity in time between the verses.  The doubting does not follow belief, but rather precedes it by several years.

Vision vs. sleep – This position might suggest that the two different prophecies were relayed in different ways.  The first was a vision while the second began as a series of active actions and ended with sleep.

One Chronological Event

The events of the entire chapter are connected and are found in their chronological place, after the War of the Five Kings.

Sources:Bereshit Rabbah46:2About Bereshit Rabbah, R. Saadia GaonTafsir Bereshit 11:31Tafsir Bereshit 15:13HaEmunot VeHaDeot 8:4About R. Saadia Gaon, Ibn EzraBereshit 11:29Bereshit 12:1Bereshit 15:1,7,12-13,17Bereshit 24:4Long Commentary Shemot 12:40Short Commentary Shemot 12:40About R. Avraham ibn Ezra, R. Yosef Bekhor ShorBereshit 12:1Bereshit 15:1-8, 12Shemot 12:40About R. Yosef Bekhor Shor, RadakBereshit 11:31Bereshit 12:1Bereshit 15:1-9, 12-13About R. David Kimchi, RambanBereshit 15:1-7,13Shemot 12:40About R. Moshe b. Nachman, RalbagBereshit Beur HaMilot 15:6-8,13Bereshit Beur HaParashah 15:4-13About R. Levi b. Gershom, Abarbanel, Hoil MosheBereshit 15:1, 16Shemot 6:2About R. Moshe Yitzchak Ashkenazi, R. David Zvi HoffmannBereshit 15:6-8About R. David Zvi Hoffmann

"וַיֹּאמֶר אֵלָיו" – The lack of named speaker and audience in this phrase suggest that the verse is a continuation of what came before and not introducing a new event.  As such, the entire chapter should be viewed as one episode occurring at one point in time.  Since the opening words of the chapter "אַחַר הַדְּבָרִים הָאֵלֶּה" clearly connect it to the previous one, the entire chapter must have occurred after the Battle of the Kings.

Introductory formula – "אֲנִי ה'‏"

• Language of oath – Radak asserts that in this verse Hashem was not trying to introduce himself to Avraham, to whom He had already been speaking, but rather He was strengthening His promise of land by stating it in His name.  Radak sees this as comparable to Hashem taking an oath in His own name.
• Special introduction for Covenant – According to R. D"Z Hoffmann, these words do constitute a new opening, since, in his opinion, verse 7 begins a new prophecy, albeit one given within a day of the previous one (see next point).  As such, the introductory formula is not problematic.¹⁸  Moreover, since Hashem is about to make a covenant with Avraham, an elaborate opening is warranted.

Vision vs. sleep – These sources disagree regarding the nature of the prophecy received by Avraham and thus differ in the way they explain this issue:

• All one vision – According to R"Y Bekhor Shor, Radak, Ralbag, and Hoil Moshe the entire chapter occurs in one long vision, including the various actions done by Avraham such as leaving his tent to view the stars¹⁹ or cutting the animals in half.²⁰  They suggest that in the middle of this vision, from the power of the prophecy, sleep fell upon Avraham.²¹
• Periods of Wakefulness and Prophecy – Ibn Ezra and Abarbanel, in contrast, assume that the chapter alternates between periods in which Avraham was awake and those in which he was sleeping. Thus, after receiving the first part of the prophecy in a vision, Avraham awoke, cut the animals, and only afterwards fell back asleep to receive further prophecy.
• Two prophecies – According to R. D"Z Hoffmann, the chapter consists of two separate, but consecutive prophecies, with verses 1-6 occurring at night and the rest of the chapter taking place the following day.  Thus, Avraham does not fall asleep mid-vision, but rather for a second revelation.

Night or day?

• Day – According to R"Y Bekhor Shor and Ralbag the entire vision occurred during the day, as evidenced by the verse, "וַיְהִי הַשֶּׁמֶשׁ לָבוֹא"‎.²²  The stars Avraham saw were only part of his dream.²³ Radak and Hoil Moshe are not explicit but as they agree that Avraham saw the stars while in a state pf prophecy it is probable that they also assume that the passage of time was not real but only part of the vision.
• Night and following day – According to Ibn Ezra and R. D"Z Hoffman, Hashem really did appear to Avraham over a period of a night and the next day.

Avraham's doubts – "הֵן לִי לֹא נָתַתָּה זָרַע" – These commentators agree that Avraham's words did not stem from doubt in Hashem's earlier promises, but disagree regarding what they maintain he was thinking instead:

• Lest he sinned - Radak and Ramban suggest that Avraham thought that maybe he had sinned and no longer deserved Hashem's promise of progeny.²⁴
• Eliezer included in "זַרְעֲךָ" – R."Y Bekhor Shor and Radak posit that maybe Avraham thought that Eliezer was included in Hashem's earlier promise "לְזַרְעֲךָ אֶתֵּן אֶת הָאָרֶץ הַזֹּאת" and thus asked that a real son inherit.  R. Yosef Bekhor Shor suggests that maybe Eliezer was a relative and thus included in the term "‎‏לְזַרְעֲךָ",‎²⁵ while Radak suggests that Avraham thought the term included important members of his household.²⁶

Avraham's doubts – "בַּמָּה אֵדַע כִּי אִירָשֶׁנָּה" – Most of these commentators maintain that this question, too, is not an expression of doubt, as the previous verse just attested to Avraham's belief.  They differ, though, in how they understand Avraham's words:

• What if sin interferes?  – Radak, Ramban, and Ralbag maintain that Avraham feared lest his children lose their inheritance due to sins ("שמו יגרום החטא").  Ramban asserts that Hashem responded by making the inheritance unconditional through the covenant.
• How will I inherit? – R"Y Bekhor Shor reinterprets the phrase to mean, "how will I inherit the land".  According to him, Avraham was asking when and by what means would the promise come to fruition.²⁷
• Part of the vision – Hoil Moshe asserts that these words of Avraham are simply part of the vision that Hashem constructed, and don't represent Avraham's thoughts at all.  Hashem only put the question into his mouth as a means of revealing to him the exile.

"וַיַּחְשְׁבֶהָ לּוֹ צְדָקָה" – These sources disagree regarding who is the subject of this phrase:

• Hashem – According to Radak and R. D"Z Hoffmann it is Hashem who thinks that Avraham's belief was meritorious.  At such an old age and after so many years of waiting for the promise to be fulfilled, it was no easy feat to maintain faith.  R. Hoffmann, in fact, claims that it is as a reward for this faith that Hashem then makes the covenant with him.
• Avraham – R"Y Bekhor Shor, Ramban, Ralbag, and Abarbanel disagree, claiming that it should be expected that Avraham will have belief.²⁸  Rather, the verse must mean that Avraham viewed Hashem's act as an act of "‎‏צדק".‎²⁹

When was the Covenant? Though all these commentators agree that the covenant took place after the war, as the opening, connecting phase "אַחַר הַדְּבָרִים הָאֵלֶּה" would suggest, they disagree regarding the specific year:³⁰ 

• Eighty – According to Ramban, Avraham was 80 at the Covenant.  This is midway between the two ages mentioned in the surrounding chapters (75 in Chapter 12 and 85 in Chapter 16).
• Eighty-five – Bereshit Rabbah and Ralbag set it at 85,³¹ the age given for Avraham in the very next chapter.³² 

Why now? It is not clear why it should be first at this point that Hashem decides to make a covenant with Avraham regarding the future inheritance, as until now He had sufficed with promises: 

• Reward – R. D"Z Hoffmann suggests that Hashem was originally simply responding to Avraham's fears post the war, and then, as a reward for the great faith that Avraham expressed ("וְהֶאֱמִן בַּי"י וַיַּחְשְׁבֶהָ לּוֹ צְדָקָה"), Hashem decided to seal His promise with a covenant.
• Reassurance – Ramban suggests that after the war, Avraham feared that the kings would retaliate and he would be killed before Hashem's promises came to fruition.  Hashem, thus, reconfirmed the blessings, and by making a covenant, He further reassured Avraham that the blessing was unconditional.
• Explanation – One might posit instead, that after conquering the four kings, Avraham felt that he was beginning to realize the promise of inheriting the land.  Hashem thus needed to reveal to him that in reality, the promise was not to be fulfilled until after 400 years of exile and slavery.³³

400 vs. 430 – These commentators resolve the discrepancy in a variety of ways, none of which require rearranging the chronology of Bereshit 15:³⁴

• Varying starting points – According to R. Saadia Gaon, Ibn Ezra and R"Y Bekhor Shor, the 430 years begins from Avraham's departure from Charan at age 70,³⁵ while the 400 starts with Yitzchak's birth (since this verse specifies "זַרְעֲךָ").
• Change of plan– According to both Ramban and Ralbag,³⁶ in contrast, the 430 years begins from the covenant, which took place at 80 (Ramban) or 85 (Ralbag). Ramban suggests that the original decree was for 400 years, but an extra 30 years of exile were added later due to the nation's sins.  Ralbag, instead, claims that the 400 years begins with Yaakov's birth, but later Hashem decided to shorten the decree by 45 years.
• Round number – Both Abarbanel³⁷ and Hoil Moshe resolve the discrepancy by suggesting that 400 is simply a round number.³⁸

¹ Rashi appears to be somewhat inconsistent.  In his comments to Shemot 12, he asserts that the Covenant took place when Avraham was 70, which suggests that he reads the two halves of the chapter as distinct units.  His comments to Bereshit 15:6, though, suggest that he views the entire chapter as one unit.

² For more details regarding how this position resolves the discrepancy, and for other opinions, see Duration of the Egyptian Exile.

³ See Chizkuni who explains that Avraham feared that surrounding nations would retaliate for his battle, leading Hashem to calm him, "אַל תִּירָא אַבְרָם".

⁴ See, though, the note below, that the midrash is somewhat self-contradictory and there is also room to suggest that it assumes that Avraham was 74 during the War of the Kings.

⁵ One could have just as easily spread the events over several years, especially since the next dated event (Bereshit 16) occurs when Avraham is 85.

⁶ See his words as cited in MS Parma 2342/1.

⁷ Tosafot set Avraham's age as 73 but their calculations (Avraham being 48 when Sedom was built and Sedom living in peace for 26 years afterwards) actually make him 74.

⁸ This is based on their understanding of Seder Olam Rabbah who, in the line before that discussed above, counts the years of the servitude to and rebellion against the four kings as 26 years. According to the midrash's reckoning, this would make Avraham 74 during the war, in direct contradiction to his statement afterwards.  See Chizkuni who attempts to reconcile the internal contradiction. See also Shabbat 10a which also dates the war to Avraham's 74th year, based on the age of Sedom.

⁹ R. Yechiel of Paris, in fact, is forced to suggests that Avraham made multiple trips back and forth to Israel, when he was 70, 74 and 75.

¹⁰ Avraham gains wealth and cattle in Egypt, leading to the dispute between his and Lot's shepherds. As a result Lot decides to move to Sedom and it is his presence there that prompts Avraham to fight the five kings.

¹¹ This redating would have Chapter 12 open with Avraham at age 75, move back in time during Chapters 12-14 to age 74 and then even further back in time in Chapter 15 to age 70.

¹² The Ran suggests that this might explain the doubling in the description of Avraham's leaving Canaan.  Verse 4 says, "ויֵּלֶךְ אַבְרָם כַּאֲשֶׁר דִּבֶּר אֵלָיו י"י וַיֵּלֶךְ אִתּוֹ לוֹט" and then verse 5 repeats, "וַיִּקַּח אַבְרָם אֶת שָׂרַי אִשְׁתּוֹ וְאֶת לוֹט... וַיֵּצְאוּ לָלֶכֶת".  Ran posits that the first "וַיֵּלֶךְ" refers to Avraham's leaving at the age of 70, while the second speaks of his second aliyah, at the age of 75.

¹³ He suggests that this is what motivates Seder Olam Rabbah to maintain instead that Avraham was in Israel during the making of the covenant but then returned to Charan.  See, though, R. Yaacov Medan in an article in מוסף השבת, מקור ראשון, פרשת לך לך תש"ע who attempts to uphold this position and suggests that the words "הָאָרֶץ הַזֹּאת" and "הֵנָּה"‎ (15:16) refer to the land Avraham is viewing (Cf. Devarim 34:4).

¹⁴ The Ran suggests that Avraham really only returned to take care of his possessions and pack up his "lift".  If so, though, it is strange why Hashem would need to command Avraham, "לֶךְ לְךָ מֵאַרְצְךָ וּמִמּוֹלַדְתְּךָ וּמִבֵּית אָבִיךָ אֶל הָאָרֶץ אֲשֶׁר אַרְאֶךָּ" as if he had not been planning on returning to Israel. The Ran does not say so, but he could have suggested that this command, too, occurred when Avraham was 70, before making the covenant and not at 75. If so, Avraham really left at 70, only returned at 75 to finish packing and when the verse writes, "וְאַבְרָם בֶּן חָמֵשׁ שָׁנִים וְשִׁבְעִים שָׁנָה בְּצֵאתוֹ מֵחָרָן" it only refers to Avraham's final and full departure.

¹⁵ This approach could respond that really Avraham had moved from Ur Kasdim to Charan at some point before the Covenant, and the verses in Chapter 11 describe that move, not his return from Canaan.
Ralbag raises a third argument against this approach as well.  He posits that it was first at the age of 85 that Avraham despaired of having children, attested to by the story of his taking Hagar as wife in Bereshit 16. As such, he finds it much more reasonable to assume that Avraham's words "וְאָנֹכִי הוֹלֵךְ עֲרִירִי" and the Covenant of the Pieces took place close to that event (which immediately follows) and not fifteen years earlier. This argument assumes that Seder Olam Rabbah understands that the entire chapter took place when Avraham was 70, but from the chronology discussed there it seems that they assume that only verses 7ff occurred then.

¹⁶ If one posits that this was a continuation, on the other hand, it would not be logical to first introduce one's self mid-conversation.

¹⁷ He asserts that, if the chapter really were chronological, it would not be a valid question from a man of faith like Avraham.  If Hashem had just promised him that his own  biological child would inherit him, how could Avraham then question the inheritance?

¹⁸ One of the strengths of R. Hoffmann's suggestion that the chapter comprises two connected prophecies is that it manages to make sense of both the language "וַיֹּאמֶר אֵלָיו" which suggests a continuation and the words "אֲנִי ה'" which suggests an opening.

¹⁹ Radak, thus, points out that Avraham was transported from his tent to view the stars in his vision, similar to the way Yechezkel was taken to Yerushalayim "בְּמַרְאוֹת אֱלֹהִים".

²⁰ See Rambam in Moreh Nevukhim 2:46  and who also reads the prophecy in this manner.

²¹ Radak compares this to Daniel's words, "וּבְדַבְּרוֹ עִמִּי נִרְדַּמְתִּי ".  He suggests that in the beginning of the vision, when Hashem shared good news, Avraham was not overcome by sleep and fear, but when Hashem began to share the news of exile, deep sleep came upon him.  This, too, finds it parallel in Daniel, whose sleep is also accompanied by the terror of his vision.
Ralbag posits, in contrast, that at times, due to a prophet's great efforts during prophecy ( "התבודדות שכלו מבין שאר כוחות הנפש"), he falls into a deep sleep.  Alternatively, he suggests that Avraham simply fell asleep due to his weariness after the Battle of the Five Kings.  He suggests that the battle took place the night before the vision, in the morning Avraham met with Malkizedek, and before the sun set, he had the prophecy.  By this point exhaustion overtook him.

²² See above note that Ralbag assumes that the war took place at night, Avraham met Malkizedek in the morning, and received the prophecy near sundown that day.

²³ Radak assumes that the particular time frames served as analogies to reinforce the prophetic message. The stars emphasized both the multitudes of Avraham's future progeny and their everlasting light, while the setting of the sun symbolized the darkness of exile.  It is unclear, though, if Radak is suggesting that Hashem purposefully had Avraham dream of  changing times to impart this extra message or if Hashem took advantage of the real-life passing of time to do so.

²⁴ Ramban connects this fear to the events of the previous chapter, suggesting that Avraham thought he would be punished for the lives he killed.

²⁵ Hashem reassures him, that only his biological son, "אֲשֶׁר יֵצֵא מִמֵּעֶיךָ", will inherit.

²⁶ He points to the phrase, "דֹּרֵשׁ טוֹב לְעַמּוֹ וְדֹבֵר שָׁלוֹם לְכָל זַרְעוֹ" as an example where the term apparently is not limited to one's offspring.

²⁷ See Abarbanel and R. D"Z Hoffmann similarly.

²⁸ It is possible that these exegetes' dismissal of the possibility that the verse would have Hashem praising Avraham just for his faith is part of an anti Christian polemic. Paul's pointing to Avraham as an exemplar of faith rather than deeds, might have led Jewish exegetes to stress that his belief alone was not particularly meritorious.

²⁹ These commentators disagree regarding the meaning of the word "צְדָקָה", with R"Y Bekhor Shor and Ramban understanding it as an act of mercy and Ralbag and Abarbanel viewing at as righteousness. The difference relates to whether Avraham thought he deserved the promise or not.

³⁰ Most of these exegetes don't address the exact date at all, simply asserting that the chapters are chronological.  Since the known dates in the surrounding unit are Avraham's leaving Charan at 75 (Chapter 12) and the giving of Hagar to Avraham at 85 (Chapter 16), the covenant could have occurred at any point between these two.

³¹ Cf. Genesis Apocryphon (1Q20) XXII:27 which also places the events of Bereshit 15 ten years after Avraham left from Haran.

³² Ralbag asserts that Avraham's complaint, "וְאָנֹכִי הוֹלֵךְ עֲרִירִי" connects it to the topic of the next chapter, the giving of Hagar to Avraham so that he could bear children, making it likely that the events of the two chapters are close in time.

³³ See ברית בין הבתרים by Menahem Ben Yashar who explains similarly.

³⁴ For a full discussion of the issue, see Duration of the Egyptian Exile.

³⁵ All three exegetes assume that Avraham left Ur Kasdim to go to Charan five years prior to his arrival in Canaan.  According to R. Saadia and Ibn Ezra the command "לֶךְ לְךָ" was already at this point, while according to R. Yosef Bekhor Shor, it was first issued after Avraham arrived and lived in Charan for five years. For elaboration on the possibilities, see Avraham's Aliyah.

³⁶ Both raise other possible explanations as well.

³⁷ Abarbanel also raises the possibility of Ramban above that Hashem added thirty years to the exile.

³⁸ They disagree, though, regarding what they think the 430 refers to.  Hoil Moshe claims that this was indeed the amount of time spent by the Israelites in Egypt while Abarbanel claims that it refers to years of exile starting from Yitzchak's birth.