Deuteronomy 2:37

2:37 However, you did not approach the land of the Ammonites, the Wadi Jabbok, the cities of the hill country, or any place else forbidden by the Lord our God.

Deuteronomy 3:16

3:16 To the Reubenites and Gadites I allocated the territory extending from Gilead as far as Wadi Arnon (the exact middle of the wadi was a boundary) all the way to the Wadi Jabbok, the Ammonite border.

Joshua 12:2

12:2 King Sihon of the Amorites who lived in Heshbon and ruled from Aroer (on the edge of the Arnon Valley) – including the city in the middle of the valley and half of Gilead – all the way to the Jabbok Valley bordering Ammonite territory.