So you shall put them on Aaron your brother and on his sons with him. You shall anoint them, consecrate them, and sanctify them, that they may minister to Me as priests.
Then Moses took some of the anointing oil and some of the blood which was on the altar, and sprinkled it on Aaron, on his garments, on his sons, and on the garments of his sons with him; and he consecrated Aaron, his garments, his sons, and the garments of his sons with him.
For the law appoints as high priests men who have weakness, but the word of the oath, which came after the law, appoints the Son who has been perfected forever.
You shall anoint them, as you anointed their father, that they may minister to Me as priests; for their anointing shall surely be an everlasting priesthood throughout their generations.”
Nadab and Abihu had died before the Lord when they offered profane fire before the Lord in the Wilderness of Sinai; and they had no children. So Eleazar and Ithamar ministered as priests in the presence of Aaron their father.