Deuteronomy 18:2-4

King James Version

² Therefore shall they have no inheritance among their brethren: the Lord is their inheritance, as he hath said unto them.

³ 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.

⁴ The firstfruit also of thy corn, of thy wine, and of thine oil, and the first of the fleece of thy sheep, shalt thou give him.