And Moses said to Aaron and to his sons Eleazar and Ithamar, “Do not dishevel your hair and do not tear your vestments, or you will die, and wrath will strike all the congregation; but your kindred, the whole house of Israel, may mourn the burning that the Lord has sent.
Nadab and Abihu died before the Lord when they offered unholy fire before the Lord in the wilderness of Sinai, and they had no children. Eleazar and Ithamar served as priests in the lifetime of their father Aaron.