Deuteronomy 4:41 - 4:43
41 Then Moses set apart three cities across the Jordan to the east toward the sunrise, 42 that a manslayer might flee there, who slew his neighbor without premeditation, not hating him previously; so he shall flee to one of these cities that he might live: 43 Bezer in the wilderness on the plateau for the Reubenites, and Ramoth in Gilead for the Gadites, and Golan in Bashan for the Manassites.