and I gave to the Reubenites and Gadites the area extending from Gilead to the Arnon Valley (the middle of the valley was the border) and up to the River Jabbok, the border of the Ammonites.
But you did not go near the Ammonites’ land, all along the bank of the River Jabbok, the cities of the hill country, or any place that the Lord our God had forbidden.
King Sihon of the Amorites lived in Heshbon. He ruled from Aroer on the rim of the River Arnon, along the middle of the valley, and half of Gilead up to the River Jabbok (the border of the Ammonites ),
The king of the Ammonites said to Jephthah’s messengers, ‘When Israel came from Egypt, they seized my land from the Arnon to the Jabbok and the Jordan. Now restore it peaceably.’