Joshua 21:40-42

Young's Literal Translation

⁴⁰ All the cities for the sons of Merari, for their families, who are left of the families of the Levites -- their lot is twelve cities.

⁴¹ All the cities of the Levites in the midst of the possession of the sons of Israel [are] forty and eight cities, and their suburbs.

⁴² These cities are each city and its suburbs round about it; so to all these cities.