Deuteronomy 4:41–43
Cities of Refuge
41 Then Moses set apart sthree cities in the east beyond the Jordan, 42 that the manslayer might flee there, anyone who kills his neighbor unintentionally, without being at enmity with him in time past; he may flee to one of these cities and save his life: 43 Bezer in the wilderness on the tableland for the Reubenites, Ramoth in Gilead for the Gadites, and Golan in Bashan for the Manassites.
Joshua 20:8
8 And nbeyond the Jordan east of Jericho, they appointed Bezer in the wilderness on the tableland, from the tribe of Reuben, and Ramoth in Gilead, from the tribe of Gad, and Golan in Bashan, from the tribe of Manasseh.