Leviticus 7:31-34

31The priest shall burn the fat on the altar, but the breast belongs to Aaron and his sons. 32You are to give the right thigh of your fellowship offerings to the priest as a contribution. 33The son of Aaron who offers the blood and the fat of the fellowship offering shall have the right thigh as his share. 34From the fellowship offerings of the Israelites, I have taken the breast that is waved and the thigh that is presented and have given them to Aaron the priest and his sons as their perpetual share from the Israelites.’ ”