“Bring your brother Aaron near with his sons from among Bnei-Yisrael, so that they may minister to Me as kohanim—Aaron and his sons Nadab and Abihu, Eleazar and Ithamar.
The sons of Amram: Aaron and Moses. Aaron, along with his descendants, was set apart to be consecrated as most holy forever, to burn incense before Adonai, to minister to Him, and to bless in His name forever.
But Aaron and his sons were the ones presenting offerings on the altar of burnt offering and on the altar of incense, for all the service of the Holy of Holies and to make atonement for Israel, according to all that Moses the servant of God had commanded.
The Levites even abandoned their pastures and their possessions and came to Judah and Jerusalem because Jeroboam and his sons had rejected them as kohanim to Adonai,
Put them on Aaron your brother and on his sons with him, and anoint them, consecrate them, and sanctify them, so that they may minister to Me as kohanim.
You are to gird Aaron and his sons with sashes, tie headwear on them, and they shall hold the priesthood by a perpetual statute. In this way you are to consecrate Aaron and his sons.
Now Aaron’s sons Nadab and Abihu each took his own censer, put fire in it, laid incense over it, and offered unauthorized fire before Adonai—which He had not commanded them.
Moses spoke to Aaron and to Eleazar and Itamar his surviving sons: “Take the grain offering left over from Adonai’s offerings by fire, and eat it without hametz beside the altar, for it is most holy.
This is the anointed portion of Aaron and the anointed portion of his sons out of the offerings of Adonai made by fire, on the day when he presented them to serve Adonai in the office of kohen.
But you and your sons with you are to maintain your priesthood for everything pertaining to the altar and inside the parokhet . I am giving you the ministry of the priesthood as a gift. Anyone unauthorized who approaches will die.”
“(Bnei-Yisrael traveled from the wells of the sons of Jaakan to Moserah—there Aaron died and was buried, and his son Eleazar served as kohen in his place.
Also did I not choose them from all the tribes of Israel to be My kohanim, to officiate at My altar, to burn incense and to wear an ephod before Me? Did I not give to the house of your father all the fire offerings of Bnei-Yisrael?