Deuteronomy 4:41-43

ISV(i) 41 Cities of RefugeThen Moses designated three cities on the east side of the Jordan, 42 where a person who accidentally killed someone could flee, if he killed his neighbor without having enmity toward him in the past. He may flee to one of these cities and live: 43 Bezer in the desert plain for the descendants of Reuben, Ramoth in Gilead for the descendants of Gad, and Golan in Bashan for the descendants of Manasseh.