The clan of Gershon was assigned thirteen cities from the territories of Issachar, Asher, Naphtali, and East Manasseh.
The families of the clan of Merari were assigned twelve cities from the territories of Reuben, Gad, and Zebulun.
By drawing lots, the people of Israel assigned these cities and their pasture lands to the Levites, as the Lord had commanded through Moses.
References for Joshua 21:8
These are the names of the cities from the territories of Judah and Simeon which were given
to the descendants of Aaron who were of the clan of Kohath, which was descended from Levi. Their assignment was the first to be made.
They were given the city of Arba (Arba was Anak's father), now called Hebron, in the hill country of Judah, along with the pasture land surrounding it.
However, the fields of the city, as well as its towns, had already been given to Caleb son of Jephunneh as his possession.
In addition to Hebron (one of the cities of refuge), the following cities were assigned to the descendants of Aaron the priest: Libnah,
Ain, Juttah, and Beth Shemesh, with their pasture lands: nine cities from the tribes of Judah and Simeon.