Deuteronomy 18:3

3 This shall be the priests' due from the people, from those offering a sacrifice, whether an ox or a sheep: they shall give to the priest the shoulder, the two jowls, and the stomach.

Deuteronomy 18:3 In-Context

1 The levitical priests, the whole tribe of Levi, shall have no allotment or inheritance within Israel. They may eat the sacrifices that are the Lord's portion
2 but they shall have no inheritance among the other members of the community; the Lord is their inheritance, as he promised them.
3 This shall be the priests' due from the people, from those offering a sacrifice, whether an ox or a sheep: they shall give to the priest the shoulder, the two jowls, and the stomach.
4 The first fruits of your grain, your wine, and your oil, as well as the first of the fleece of your sheep, you shall give him.
5 For the Lord your God has chosen Levi out of all your tribes, to stand and minister in the name of the Lord, him and his sons for all time.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.