Deuteronomy 18:3-5

Modern English Version

³ This shall be the priest’s due from the people, from them that offer a sacrifice, whether it be an ox or sheep: they shall give to the priest the shoulder, the two cheeks, and the stomach. ⁴ You must give him the first fruit of your grain, of your wine, and of your oil, and the first of the fleece of your sheep also. ⁵ For the Lord your God has chosen him out of all your tribes to stand to minister in the name of the Lord, him and his sons forever.