2 Therefore they shall have no inheritance among their brethren; the Lord is their inheritance, as He said to them. 3 "And this shall be the priest's due from the people, from those who offer a sacrifice, whether it is bull or sheep: they shall give to the priest the shoulder, the cheeks, and the stomach. 4 The firstfruits of your grain and your new wine and your oil, and the first of the fleece of your sheep, you shall give him. 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.
Matthew Henry's Commentary on Deuteronomy 18:2-5
Commentary on Deuteronomy 18:1-8
(Read Deuteronomy 18:1-8)
Care is taken that the priests entangle not themselves with the affairs of this life, nor enrich themselves with the wealth of this world; they have better things to mind. Care is likewise taken that they want not the comforts and conveniences of this life. The people must provide for them. He that has the benefit of solemn religious assemblies, ought to give help for the comfortable support of those that minister in such assemblies.