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 a due for ever from the children of Israel: for it is an heave offering: and it shall be an heave offering from the children of Israel of the sacrifices of their peace offerings, even their heave offering unto the LORD.