Aaron, certainly, as well as his sons. And you shall impose headdresses upon them. And they shall be priests to me by a perpetual ordinance. After you have initiated their hands,
And Moses spoke to Aaron, and to his sons, Eleazar and Ithamar, who were remaining: "Take the sacrifice which remains from the oblation of the Lord, and eat it without leaven next to the altar, because it is the Holy of holies.
But as for you and your sons: guard the priesthood. For all that pertains to the service of the altar and of what is beyond the veil shall be exercised by the priests. If any outsider will approach, he shall be killed."
For Nadab and Abihu died without children, when they offered, in the sight of the Lord, a strange fire, in the desert of Sinai. And so, Eleazar and Ithamar exercised the priesthood in the sight of Aaron, their father.