What was wrong? These sources bring an array of possible wrongdoings, including bringing the wrong fire,1 not wearing the proper clothing, failing to wash before service, or entering the Mishkan while intoxicated.2 Though there is a clear mention of the first wrongdoing, "וַיַּקְרִיבוּ לִפְנֵי י"י אֵשׁ זָרָה", there is no explicit mention of any of the other three. Nonetheless, the fact that the prohibition to drink wine immediately follows the story might be brought as support that the crime involved drinking.
"אֵשׁ זָרָה"
Wrong fire - According to most of these commentators, this phrase describes Nadav and Avihu's main sin, bringing fire from a foreign source. According to R. Yosef Bekhor Shor, although a priest is normally allowed to bring fire of his own ("מן ההדיוט"),3 on this day Hashem had wanted the sacrifices to be consumed only via His fire4 so as to glorify His name.5 Others might maintain, instead, that the incense offering must always be brought from the Outside Altar (as per Vayikra 16:12),6 but Nadav and Avihu brought it from a regular oven.7
Problematic offering –The sources who see other procedural mistakes as the problem might suggest that any sacrifice not brought according to proper protocol is in essence a "foreign fire".
"אֲשֶׁר לֹא צִוָּה אֹתָם" – These commentators can explain this verse in one of two ways, depending on the sin attributed to Nadav and Avihu:
Lack of command – Ibn Ezra explains that the verse teaches that the brothers acted according to their own understanding, rather than on Hashem's command. Hashem had never prohibited Nadav and Avihu from bringing their own fire on the eighth day, but He had not authorized it either. Accordingly, the sources which view this as the sin will have to explain why the brothers received such a severe punishment.
Prohibition – Those commentators who posit that the sin related to clothing, washing or drunkenness might instead explain the verse as if written,"אשר צוה אותם לא"8 ("that he commanded not to"). For each of these actions there is an explicit warning in Torah, and as such Nadav and Avihu should have known better.9
" לִפְנֵי י"י" – Most of these sources would likely explain that " לִפְנֵי י"י" refers to the Outer Sanctum where the brothers brought the incense on the altar.10
What motivated the brothers?
Mistake – According to R"Y Bekhor Shor, Nadav and Avihu simply made a mistake, not realizing that Hashem did not want them to bring of their own fire on this day.11 Other procedural sins might similarly be explained as errors; the brothers were still new to service and not as aware as they should have been.
Lack of Faith – One opinion in the Sifra and R. Bachya, instead, explain that the brothers actions stemmed from a lack of faith. They feared either that no fire would come down,12 or that Hashem's fire on the Altar was not sufficient to consume everything and thus they brought their own.
Remove inhibitions – According to those who suggest that Nadav and Avihu were intoxicated, it is possible that the brothers motives were positive, thinking that it was best to serve Hashem when uninhibited or that drink would raise them to higher levels of zeal. Alternatively, It is also possible that surrounding cultures worshiped while intoxicated and that the brothers were simply imitating what they knew.
"בִּקְרֹבַי אֶקָּדֵשׁ "
Breaching of Boundaries
The brothers were killed for reaching beyond what was permitted them in approaching God.
Nadav and Avihu's actions alone would not have warranted their death, but because they were in the wrong place at the wrong time, they were consumed by Hashem's fire.
Nadav and Avihu were punished because of an error in cultic practice. This position subdivides based on the specific aspect of service that is considered problematic:
Unauthorized Fire
Nadav and Avihu brought the wrong fire for the incense offering.
"אֵשׁ זָרָה" – All these sources maintain that it was this "fire from a foreign source" that was problematic, explaining that Nadav and Avihu erroneously used fire of their own (מן ההדיוט), from a regular oven. However, it is not explicit what is wrong with this:
Not from Hashem's fire – Rashbam and R. Yosef Bekhor Shor explain that although a priest is normally allowed to bring fire "מן ההדיוט",15 on this special day of the Mishkan's consecration Hashem had wanted the sacrifices to be consumed only via Hashem's fire16 so as to glorify His name through the miracle.17
Not from the Copper Altar - The others might suggest, as does the Raavad,18 that although the priest is commanded to light of his own fire for the Copper Altar, this is not true regarding the incense offering. Its fire needs to be taken from the Outer Altar (as per Vayikra 16:12) while Nadav and Avihu took it from a regular oven.
From the wrong place on the altar – Ralbag goes further to suggest that the brothers might have even taken fire from the Outside Altar, but from the wrong place on it.
"אֲשֶׁר לֹא צִוָּה אֹתָם" – These sources disagree regarding the meaning of this phrase and what it says about the brothers' actions:
That was not commanded – Rashbam explains that although normally the brothers' actions would have been permitted, on thisday, Hashem did not command them to do so. Ibn Ezra similarly writes that the phrase means that the brothers acted according to their own understanding, not Hashem's command. Sometimes, acting on the absence of a command is itself problematic, even if unintentional.
That was prohibited – R. Yosef Bekhor Shor explains in contrast, that the verse should be read as if written "אשר צוה אותם לא",19 that the brothers acted against an explicit prohibition, "לֹא תַעֲלוּ עָלָיו קְטֹרֶת זָרָה". It is not clear if he thinks that this is a second wrong-doing of the brothers (that the offering itself was unauthorized) or if he thinks that the fact that the fire was unauthorized is enough to make the entire offering a "קְטֹרֶת זָרָה".
"לִפְנֵי י"י " – Though all these sources might agree that from a literal standpoint, the phrase simply means "before Hashem", they disagree regarding its specific connotation in its various appearances in the unit:
All are geographical markers – According to Rashbam, in each of its appearances the phrase refers to a geographical location, but not to the same one. When the verses states that Nadav and Avihu brought their offering "לִפְנֵי י"י", it refers to the Outer Sanctum, but when it speaks of the fire that came "מִלִּפְנֵי י"י" to consume them, it refers to the Inner Sanctum. According to him, the fire which killed the brothers is the same godly fire mentioned in Vayikra 9:24 that consumed Aharon's offerings on the Outer Altar. It did not come vertically down from the heavens, but horizontally from the Holy of Holes to the Outer Sanctum (where it met the brothers) to the Outer Altar.20
Action emanating from Hashem – The other sources might suggest that while the phrase "לִפְנֵי י"י" refers to the Inner Sanctum where the brothers offered the incense, the term "מִלִּפְנֵי י"י" that is mentioned in 9:24 and 10:2 more simply means "from God", and connotes a supernatural fire.
Spiritual evaluation – Ibn Ezra uniquely understands the phrase "וַיָּמֻתוּ לִפְנֵי י"י" to refer not to a geographical location, but a spiritual one. The brothers acted and died "before God", thinking that they were doing something pleasing to Him.
What motivated the brothers?
Mistake – According to some of these sources,21 Nadav and Avihu simply made a mistake, erroneously assuming that the law regarding "אש מן ההדיוט" that was true on other days would apply to the eighth day as well. The Bavli and Lekach Tov criticize the brothers for making their own assumptions and not verifying with Moshe.
Lack of Faith – One opinion in the Sifra and R. Bachya, instead, explain that the brothers actions stemmed from a lack of faith. They feared either that no fire would come down, or that there was not enough fire on the Altar to consume everything and thus they brought their own.
"בִּקְרֹבַי אֶקָּדֵשׁ "
According to Rashbam, the word "קְרֹבַי " (my close ones) refers not to Nadav and Avihu but to Aharon, who was to sanctify Hashem's name by continuing with Hashem's service and not mourning.22
Ibn Ezra and R. Yosef Bekhor Shor,23 in contrast, assert that the term refers to Nadav and Avihu , who despite their error were still considered close to Hashem.
Severity of punishment
Lesson to others – Ralbag maintains that the punishment needed to be severe to teach the nation the importance of being exacting in observing the laws of sacrifices.
Natural consequence – Drawing on Rashbam's understanding that Nadav and Avihu erred unintentionally and that the fire which killed them was the fire intended to consume Aharon's sacrifices which emanated from the Holy of Holies,24 T. Granot suggests that Nadav and Avihu's deaths be viewed not as a punishment but a "work accident". Though they mistakenly brought the wrong fire, this in and of itself would not have warranted death. However, since they were in the wrong place at the wrong time, they were naturally burnt when the fire made its way from the Holy of Holies.25
Context - prohibition to drink wine – According to this approach, the prohibition to drink wine might follow this story not because the brothers sinned in this regard but as another warning of the need to be exacting and careful when serving in the Mikdash.
Yom Kippur Service
Unauthorized Offering
Nadav and Avihu brought a an incense offering that was not commanded.
"אֵשׁ זָרָה" – According to these sources, this phrase is equivalent to "קטורת זרה", meaning an unauthorized (and therefore foreign) incense offering. The Biur explains that the term "אֵשׁ" is really just a variation of to the term "אִשֶּׁה לַי"י'", another name for sacrifices.27 R. D"Z Hoffmann adds that it was not called a "ketoret" since it was not brought on the incense altar.28
Why was the Ketoret unauthorized?
Additional service – Most of these sources view this as an additional incense offering (not that brought every morning)29 that the brothers brought on their own, as individuals and not as representatives of the nation. Since the verse states that "לֹא תַעֲלוּ עָלָיו קְטֹרֶת זָרָה ", any extra incense offering was considered problematic.
Aharon's Job -– Abarbanel asserts that on the eighth day, Aharon alone was supposed to do all aspects of the service,30 similar to the service of the Day of Atonement which is done by the high priest alone.31 According to Seforno, not only on the eighth day but throughout the period of Wanderings in the Wilderness, only the high priest was allowed to bring incense (or perform any other services in the sanctuary). This was due to Hashem's constant presence on the Tabernacle.
"אֲשֶׁר לֹא צִוָּה אֹתָם"
According to most of these sources the fact that the offering was not commanded is what made it foreign, and therefore problematic. R. Hirsch emphasizes how there is no such thing as subjectivity in sacrificial service; a person cannot create their own sacrifice nor act on their own individual desires, but only on the commands of Hashem.32
Chizkuni, like R"Y Bekhor Shor above, instead reads the verse to mean "which Hashem commanded not [to bring]", pointing to the prohibition in Shemot 30:9 against bringing a "foreign incense offering".
What motivated the brothers?
Positive motivation – According to the Biur, R. Hirsch and R. D"Z Hoffmann, the brothers' motivations were pure. They brought the sacrifice out of a desire for closeness to Hashem.
Mistaken – Seforno suggests that Nadav and Avihu mistakenly assumed that just like an incense is brought after the Daily Offering due to its bringing of Hashem's presence, so too on the eighth day after Hashem's fire descended and His glory was revealed, an incense offering was called for.33
Negativemotivation– Shadal, in contrast, attributes the brothers' actions to excessive haughtiness and a desire not to be overshadowed by their father.34 Since they had not been given any individual service to perform they took upon themselves one of the most precious.
"לִפְנֵי י"י" – While Seforno assumes that the brothers brought the incense on the Incense Altar in the Outer Sanctum, Abarbanel, the Biur, and R. Hoffmann assume that "לִפְנֵי י"י" refers to the Holy of Holies. Abarbanel views this as an additional sin, but the Biur explains that this was not yet prohibited35 and as such was not the problem.
"בִּקְרֹבַי אֶקָּדֵשׁ "
According to the Biur, R. Hirsch and R. D"Z Hoffman, Moshe comforted Aharon in these words, telling him that his sons were amongst Hashem's most holy. Their actions were motivated by a closeness to God, and not sinful thoughts.
Shadal, who views the brothers more negatively, could suggest, as does Rashbam, that the term refers not to Nadav and Avihu, but to Aharon, who was to sanctify Hashem's name by continuing with Hashem's service and not mourning.
Severity of punishment – The Biur explains that the brothers were only punished so severely due to their high stature. He compares their punishment to that of Moshe and Aharon by the rock, whose sin also merited a disproportionately severe punishment. He note that there too the verse states "וַיִּקָּדֵשׁ בָּם".
Erroneous Service
Breaching of Boundaries
Coming too close to the presence of God resulted in the brothers' deaths.