JOS 12:2

2 One of them was Sihon, the king of the Amor people-group. He lived in Heshbon [city] and ruled over the area from Aroer [town] along the Arnon River Gorge, north to the Jabbok River. His land started in the middle of the gorge, which was the border between his land and the land of the Ammon people-group. Sihon also ruled over [the southern] half of the Gilead region,