Deuteronomy 18 - 19

1 “The priests, the Levites—all the tribe of Levi—shall have no part nor inheritance with Israel; they shall eat the offerings of the Lord made by fire, and His portion. 2 Therefore they shall have no inheritance among their brethren; the Lord is their inheritance, as He said to them. 3 “And this shall be the priest’s due from the people, from those who offer a sacrifice, whether it is bull or sheep: they shall give to the priest the shoulder, the cheeks, and the stomach. 4 The firstfruits of your grain and your new wine and your oil, and the first of the fleece of your sheep, you shall give him. 5 For the Lord your God has chosen him out of all your tribes to stand to minister in the name of the Lord, him and his sons forever …
— DEUTERONOMY 18 - 19