John Wesley on Deuteronomy 18:8

Like portions - With their brethren who were in actual ministration: as they share with them in the work, so shall they in the encouragements. Beside that which cometh - The reason of this law was, because he that waited on the altar, ought to live by the altar: and because it was fit he should keep his money, wherewith he might redeem what he sold, if afterwards he saw occasion for it. Mr. Henry adds a remarkable note here: especially considering he wrote threescore years ago. "A hearty, pious zeal to serve God and his church, tho' it may a little encroach upon a settled order, and there may be somewhat in it that looks irregular, yet ought to be gratified, and not discouraged. He that loves dearly to be employed in the service of the sanctuary: in God's name let him minster. He shall be as welcome to God as the Levites, whose course it was to minister, and should be so to them."