Leviticus 7:30-32

³⁰He shall hold in his hands the inner fatness of the sacrifice, and the breast; and when he hath hallowed both (of) these (to be) offered to the Lord, he shall take them to the priest,

³¹the which shall burn the inner fatness upon the altar; soothly the breast shall be Aaron’s and his sons’;

³²and the right shoulder of the sacrifices of peaceable things shall turn into the first fruits of the priest. (and the right shoulder of the peace offering shall be a special contribution, given to the priest who killeth the offering.)