Deuteronomy 18:1; Deuteronomy 18:3

1 The Levitical priests—indeed, the whole tribe of Levi—are to have no allotment or inheritance with Israel. They shall live on the food offerings presented to the LORD, for that is their inheritance.

3 This is the share due the priests from the people who sacrifice a bull or a sheep: the shoulder, the internal organs and the meat from the head.