Deuteronomy 4:41-43

41Then Moses separated three cities on this side the Jordan toward the sun-rising,

42that the manslayer might flee thither, who should kill his neighbour unawares, and hated him not previously, that fleeing to one of these cities, he might live:

43Bezer in the wilderness, in the plateau, of the Reubenites, and Ramoth in Gilead, of the Gadites, and Golan in Bashan, of the Manassites.