TSK · Joshua 21:6

And these are the names of the sons of Levi according to their generations: Gershon, and Kohath, and Merari; and the years of the life of Levi were a hundred thirty and seven years.

Of Gershon was the family of the Libnites, and the family of the Shimeites: these are the families of the Gershonites.

All the cities of the Gershonites according to their families were thirteen cities with their suburbs.

And to the sons of Gershom, according to their families, out of the tribe of Issachar, and out of the tribe of Asher, and out of the tribe of Naphtali, and out of the tribe of Manasseh in Bashan, thirteen cities.