Now Nadab and Abiu died, without children, when they offered strange fire before the Lord, in the desert of Sinai: and Eleazar and Ithamar performed the priestly office in the presence of Aaron their father.
But thou and thy sons look ye to the priesthood. And all things that pertain to the service of the altar, and that are within the veil, shall be executed by the priests. If any stranger shall approach, he shall be slain.
And Moses spoke to Aaron, and to Eleazar and Ithamar, his sons that were left: Take the sacrifice that is remaining of the oblation of the Lord, and eat it without leaven beside the altar, because it is holy of holies.
To wit, Aaron and his children: and thou shalt put mitres upon them. And they shall be priests to me by a perpetual ordinance. After thou shalt have consecrated their hands,