Joshua 13:8-10

8With 1the other half-tribe, the Reubenites and the Gadites received their inheritance which Moses gave them 2beyond the Jordan to the east, just as Moses the servant of the Lord gave to them;

9from Aroer, which is on the edge of the valley of the Arnon, with the city which is in the middle of the valley, and all the plain of Medeba, as far as Dibon;

10and all the cities of Sihon king of the Amorites, who reigned in Heshbon, as far as the border of the sons of Ammon;