21:41 All the cities of the Levites {n} within the possession of the children of Israel [were] forty and eight cities with their suburbs.
(n) Thus according to Jacob's prophecy they were scattered throughout the country, which God used so that his people might be instructed in the true religion by them.
21:41 Forty eight cities - Why hath this tribe, which was the least of all, more cities than any of them? First, it doth not appear that they had more: for though all the cities of the Levites be expressed, it is not so with the other tribes, but divers of their cities are omitted. Secondly, the Levites were confined to their cities and suburbs; the rest had large territories belonging to their cities, which also so they were in a capacity of improving, which the Levites were not; so that one of their cities might be more considerable than divers of the Levites. Thirdly, God, was pleased to deal liberally with his ministers, to put honour on those whom he foresaw many would be prone to despise; and, that being free from outward distractions, they might more entirely and fervently devote themselves to the service of God.
21:9-42 By mixing the Levites with the other tribes, they were made to see that the eyes of all Israel were upon them, and therefore it was their concern to walk so that their ministry might not be blamed. Every tribe had its share of Levites' cities. Thus did God graciously provide for keeping up religion among them, and that they might have the word in all parts of the land. Yet, blessed be God, we have the gospel more diffused amongst us.