Deuteronomy 18:3-5

New International Version - UK

³ This is the share due to the priests from the people who sacrifice a bull or a sheep: the shoulder, the internal organs and the meat from the head. ⁴ You are to give them the firstfruits of your corn, new wine and olive oil, and the first wool from the shearing of your sheep, ⁵ for the Lord your God has chosen them and their descendants out of all your tribes to stand and minister in the Lord’s name always.