Exodus 29:27-28

27And 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: 28and 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.