Exodus 29:26-31

And thou shalt take the breast of Aaron’s ram of consecration, and wave it for a wave-offering before Jehovah: and it shall be thy portion. And thou shalt sanctify the breast of the wave-offering, and the thigh of the heave-offering, which is waved, and which is heaved up, of the ram of consecration, even of that which is for Aaron, and of that which is for his sons: and it shall be for Aaron and his sons as their portion for ever from the children of Israel; for it is a heave-offering: and it shall be a heave-offering from the children of Israel of the sacrifices of their peace-offerings, even their heave-offering unto Jehovah. And the holy garments of Aaron shall be for his sons after him, to be anointed in them, and to be consecrated in them. Seven 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. And thou shalt take the ram of consecration, and boil its flesh in a holy place.