Leviticus 7:31-35

31The priest shall offer up the fat in smoke on the altar, but 1the breast shall belong to Aaron and his sons. 32You shall give 2the right thigh to the priest as a 3contribution from the sacrifices of your peace offerings. 33The one among the sons of Aaron who offers the blood of the peace offerings and the fat, the right thigh shall be his as his portion. 34For I have taken 4the breast of the wave offering and the thigh of the 5contribution from the sons of Israel from the sacrifices of their peace offerings, and have given them to Aaron the priest and to his sons as their due forever from the sons of Israel.

35‘This is 6that which is consecrated to Aaron and 7that 8which is consecrated to his sons from the offerings by fire to the Lord, in that day when he presented them to serve as priests to the Lord.