And thou shalt gird them with girdles, Aaron and his sons, and bind headtires on them: and they shall have the priesthood by a perpetual statute: and thou shalt consecrate Aaron and his sons.
And Moses spake unto Aaron, and unto Eleazar and unto Ithamar, his sons that were left, Take the meal offering that remaineth of the offerings of the LORD made by fire, and eat it without leaven beside the altar: for it is most holy:
And thou and thy sons with thee shall keep your priesthood for every thing of the altar, and for that within the veil; and ye shall serve: I give you the priesthood as a service of gift: and the stranger that cometh nigh shall be put to death.
And Nadab and Abihu died before the LORD, when they offered strange fire before the LORD, in the wilderness of Sinai, and they had no children: and Eleazar and Ithamar ministered in the priest's office in the presence of Aaron their father.