Leviticus 10:14; Deuteronomy 18:3

14 But the qbreast that is waved and the thigh that is contributed you shall eat in a clean place, you and your sons and your daughters with you, for they are given as your due and your sons' due from the sacrifices of the peace offerings of the people of Israel.

And this shall be the priests' due from the people, from those offering a sacrifice, whether an ox or a sheep: pthey shall give to the priest the shoulder and the two cheeks and the stomach.