Beside that which cometh of the sale of his patrimony - The Levites had indeed "no part nor inheritance with Israel," but they might individually possess property, and in fact often did so (compare 1-Kings 2:26; Jeremiah 32:7; Acts 4:36). The Levite who desired to settle at the place of the sanctuary would probably sell his patrimony when quitting his former home. The text directs that he should, notwithstanding any such private resources, duly enjoy his share of the perquisites provided for the ministers at the sanctuary, and as he was "waiting at the altar" should be "partaker with the altar" 1-Corinthians 9:13.

The sale of his patrimony - So we find that, though the Levites might have no part of the land by lot, yet they were permitted to make purchases of houses, goods, and cattle, yea, of fields also. See the case of Abiathar, 1-Kings 2:26 (note), and of Jeremiah, Jeremiah 32:7-8 (note).

They shall have like portions to eat, (d) beside that which cometh of the sale of his patrimony.
(d) Not forced to live from himself.

They shall have like portions to eat,.... Equal parts of the sacrifices with the priests that usually ministered there; hence we learn, says Jarchi, that they divided the skins and flesh of the sin offerings; perhaps even such as did not come by virtue of the feast, as the daily sacrifices, and the additions of the sabbath, and the vows, and the freewill offerings:
beside that which cometh by the sale of his patrimony: for though the priests and Levites had no inheritance divided to them in the land, yet they might buy houses and fields, and leave them to their children, and this may be called their patrimony; now it was not reasonable that they should wholly live upon this, or spend what their fathers left them; but, besides the income of that, were to have their part and portion with their brethren in the sacrifices of the sanctuary. But some interpret these words in a different way, as if they had respect to the gifts and oblations in the several wards in which the priests ministered, as they were ordered by their fathers, Eleazar, Ithamar, Samuel, David, and Solomon; so the Targums of Onkelos, Jonathan, and Jarchi. In the times of Eleazar and Ithamar, there were only eight wards or courses, which ministered in their turns, but in the days of David they were divided into twenty four; See Gill on Luke 1:8; now the ordering and fixing these in their turns is called a vendition or sale; and these country priests might partake of all sacrifices at the feast, excepting those which belonged to him whose course it was that week.

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."