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.
3. this shall be the priest's due from the people—All who offered sacrifices of thanksgiving or peace offerings (Le 7:31-33) were ordered to give the breast and shoulder as perquisites to the priests. Here "the two cheeks" or head and "the maw" or stomach, deemed anciently a great dainty, are specified. But whether this is a new injunction, or a repetition of the old with the supplement of more details, it is not easy to determine.