Joshua 21:19-21

Young's Literal Translation

¹⁹ all the cities of the sons of Aaron the priests, [are] thirteen cities and their suburbs.

²⁰ And for the families of the sons of Kohath, the Levites, who are left of the sons of Kohath, even the cities of their lot are of the tribe of Ephraim;

²¹ and they give to them the city of refuge [for] the man-slayer, Shechem and its suburbs, in the hill-country of Ephraim, and Gezer and its suburbs,