Joshua 13:8-11

With the other half-tribe [of Manasseh], the Reubenites and the Gadites received their inheritance which Moses gave them beyond the Jordan eastward, just as Moses the servant of the LORD gave to them; from Aroer on the edge of the valley of the [river] Arnon, and the city in the middle of the valley, and all the plain of Medeba, as far as Dibon; and all the cities of Sihon king of the Amorites, who reigned in Heshbon, as far as the border of the Ammonites; and Gilead, and the territory of the Geshurites and Maacathites, and all Mount Hermon, and all Bashan as far as Salecah