Exodus 29:27-28

And thou shalt sanctify the breast of the wave offering, and the shoulder of the heave offering, which is waved, and which is heaved up, of the ram of the consecration, {even} of {that} which {is} for Aaron, and of {that} which is for his sons: And it shall be Aaron's and his sons' by a statute 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 sacrifice of their peace offerings, {even} their heave offering unto the LORD.