Exodus 29:29-33

29And the holy garments of Aaron shall be for his sons after him, to be anointed in them, and to be consecrated in them. 30Seven days shall the son that is priest in his stead put them on, when he cometh into the tent of meeting to minister in the holy place.

31And thou shalt take the ram of consecration, and boil its flesh in a holy place. 32And Aaron and his sons shall eat the flesh of the ram, and the bread that is in the basket, at the door of the tent of meeting. 33And they shall eat those things wherewith atonement was made, to consecrate and to sanctify them: but a stranger shall not eat thereof, because they are holy.