“You are to clothe them – your brother Aaron and his sons with him – and anoint them and ordain them and set them apart as holy, so that they may minister as my priests.
and anoint them just as you anointed their father, so that they may minister as my priests; their anointing will make them a priesthood that will continue throughout their generations.”
Then Moses took some of the anointing oil and some of the blood which was on the altar and sprinkled it on Aaron and his garments, and on his sons and his sons’ garments with him. So he consecrated Aaron, his garments, and his sons and his sons’ garments with him.
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. So Eleazar and Ithamar ministered as priests in the presence of Aaron their father.
For the law appoints as high priests men subject to weakness, but the word of solemn affirmation that came after the law appoints a son made perfect forever.