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).
These verses presuppose that part of the Levites only will be in residence and officiating at the place of the sanctuary, the others of course dwelling at their own homes in the Levitical cities, or “sojourning” elsewhere; compare the marginal references. But if any Levite out of love for the service of the sanctuary chose to resort to it when he might reside in his own home, he was to have his share in the maintenance which was provided for those ministering in the order of their course.
Deuteronomy 18:8
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.