Joshua 20:4

20:4 The one who committed manslaughter should escape to one of these cities, stand at the entrance of the city gate, and present his case to the leaders of that city. They should then bring him into the city, give him a place to stay, and let him live there.

Joshua 21:27

21:27 They assigned to the Gershonite clans of the Levites the following cities: from the half-tribe of Manasseh: Golan in Bashan (a city of refuge for one who committed manslaughter) and Beeshtarah, along with the grazing areas of each – a total of two cities;