13 Thus to the children of Aaron the priest they gave Hebron with its common-land (a city of refuge for the slayer), Libnah with its common-land, 14 Jattir with its common-land, Eshtemoa with its common-land, 15 Holon with its common-land, Debir with its common-land, 16 Ain with its common-land, Juttah with its common-land, and Beth Shemesh with its common-land: nine cities from those two tribes; 17 and from the tribe of Benjamin, Gibeon with its common-land, Geba with its common-land, 18 Anathoth with its common-land, and Almon with its common-land: four cities. 19 All the cities of the children of Aaron, the priests, were thirteen cities with their common-lands.
Matthew Henry's Commentary on Joshua 21:13-19
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.