Deuteronomy 18:1-3

The priests the Levites, and 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 inheritance.

Therefore shall they have no inheritance among their brethren: the LORD is their inheritance, as he hath said unto them.

And this shall be the priest’s due from the people, from them that offer a sacrifice, whether it be ox or sheep; and they shall give unto the priest the shoulder, and the two cheeks, and the maw.