34 And to the rest of the Levites, the Merarite clans, were given out of the tribe of Zebulun, Jokneam with its pasturelands, Kartah with its pasturelands, 35 Dimnah with its pasturelands, Nahalal with its pasturelands--four cities; 36 and out of the tribe of Reuben, Bezer with its pasturelands, Jahaz with its pasturelands, 37 Kedemoth with its pasturelands, and Mephaath with its pasturelands--four cities; 38 and out of the tribe of Gad, Ramoth in Gilead with its pasturelands, the city of refuge for the manslayer, Mahanaim with its pasturelands, 39 Heshbon with its pasturelands, Jazer with its pasturelands--four cities in all. 40 As for the cities of the several Merarite clans, that is, the remainder of the clans of the Levites, those allotted to them were in all twelve cities.
Matthew Henry's Commentary on Joshua 21:34-40
Commentary on Joshua 21:9-42
(Read Joshua 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.