Leviticus 8:29-31

²⁹And Moses took the breast, waving it for a wave offering before the Lord; it was Moses' part of the sheep of the priest's offering, as the Lord gave orders to Moses.

³⁰And Moses took some of the holy oil and of the blood which was on the altar and put it on Aaron and on his robes, and on his sons and on his sons' robes; and made Aaron holy, and his robes and his sons and his sons' robes with him.

³¹And Moses said to Aaron and to his sons, The flesh is to be cooked in water at the door of the Tent of meeting, and there you are to take it as food, together with the bread in the basket, as I have given orders, saying, It is the food of Aaron and his sons.