Deuteronomy 18:1-5

¹The priests the Levites, [even] all the tribe of Levi, shall have no portion nor inheritance with Israel: they shall eat the offerings of Jehovah made by fire, and his inheritance. ²And they shall have no inheritance among their brethren: Jehovah is their inheritance, as he hath spoken unto them. ³And this shall be the priests` due from the people, from them that offer a sacrifice, whether it be ox or sheep, that they shall give unto the priest the shoulder, and the two cheeks, and the maw. ⁴The first-fruits of thy grain, of thy new wine, and of thine oil, and the first of the fleece of thy sheep, shalt thou give him. ⁵For Jehovah thy God hath chosen him out of all thy tribes, to stand to minister in the name of Jehovah, him and his sons for ever.