Deuteronomy 2:37

37Only to the land of the sons of Ammon you did not draw near, that is, to all the banks of the river aJabbok and the cities of the hill country, whatever the Lord our God had forbidden us.

Deuteronomy 3:16

16and to the Reubenites band the Gadites I gave the territory from Gilead as far as the Valley of the Arnon, with the middle of the valley as a border, as far over as the river Jabbok, cthe border of the Ammonites;

Joshua 12:2

2 dSihon king of the Amorites who lived at Heshbon and ruled from Aroer, which is on the edge of the Valley of the Arnon, and efrom the middle of the valley as far as the friver Jabbok, the boundary of the Ammonites, that is, half of Gilead,
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