Deuteronomy 18:1-4

1“The Levitical kohanim, all the tribe of Levi, are to have no portion or inheritance with Israel. They are to eat the offerings made to Adonai by fire as His inheritance.

2They will have no inheritance among their brothers—Adonai is their inheritance, just as He promised them.

3So this will be the share due to the kohanim from the people—from those who offer a sacrifice, whether a bull or sheep, they are to give the kohen the shoulder, two cheeks, and the stomach.

4The firstfruits of your grain, of your new wine, of your oil, and the first fleece of your sheep, you are to give him.