19 And Aaron said unto Moses, Behold, this day have they offered their sin offering and their burnt offering before the Lord; and such things have befallen me: and if I had eaten the sin offering to day, should it have been accepted in the sight of the Lord?

20 And when Moses heard that, he was content.

When we heard of the trespass of Nadab and Abihu, I made the case that their sin seemed more egregious and intentional than just performing part of the ritual incorrectly, given that when Eleazer and Ithamar made such an error, they faced no such divine retribution.

Aaron gives an explanation to Moses as to why the priests’ portion was not eaten of the sin offering. At first, it is hard to follow what exactly he is saying, probably due to awkwardness in translation. The general consensus among scholars, though, is that when he says, “such things have befallen me” he is referring to the destruction of Nadab and Abihu, and the grief he and his sons were feeling as a result. Perhaps he means that they felt unworthy to partake with the Lord when they were so near to His wrath, or that in their grief they had been unable to remember all of the steps of the ritual.

Grim of a thought as it is, one might also consider the sin offering to have already been fulfilled by the conflagration of Nadab and Abihu. They were burned for their sins, after all, and one could hardly assume Aaron and his sons to feast on the remains of that! Perhaps Nadab and Abihu’s death rendered the animal offering redundant.

It is interesting to note that as in the case of the golden calf, Aaron stands between Moses and the people. Not justifying error, not saying that Moses’s expectations are wrong, but to be the voice of others and give explanation for why they went astray. Moses also stands between Israel and God, representing more of the law and power of God, while Aaron stands between Israel and God, representing more the flaws and foibles of the people. Thus, in the two brothers is the meeting of both worlds. It was very appropriate, therefore, that Aaron was chosen for his role as the High Priest, making propitiation for Israel to God. And in this case, as with that of the golden calf, Moses heard his explanation, had respect to it, and was content.