Numbers 35:6

35:6 Now from these towns that you will give to the Levites you must select six towns of refuge to which a person who has killed someone may flee. And you must give them forty-two other towns.

Numbers 35:11-14

35:11 you must then designate some towns as towns of refuge for you, to which a person who has killed someone unintentionally may flee. 35:12 And they must stand as your towns of refuge from the avenger in order that the killer may not die until he has stood trial before the community. 35:13 These towns that you must give shall be your six towns for refuge.

35:14 “You must give three towns on this side of the Jordan, and you must give three towns in the land of Canaan; they must be towns of refuge.