Deuteronomy 2:37

Then Israel sent messengers to Sihon, king of the Amorites, saying,

Then Israel struck him with the edge of the sword and took possession of his land from the Arnon to the Jabbok, as far as the sons of Ammon; for the border of the sons of Ammon was Jazer.

“And to the Reubenites and to the Gadites I gave from Gilead even as far as the valley of Arnon, the middle of the valley as a border and as far as the river Jabbok, the border of the sons of Ammon;

“Then you came to this place, and Sihon the king of Heshbon and Og the king of Bashan came out to meet us for battle, but we struck them down;

‘So they possessed all the territory of the Amorites, from the Arnon as far as the Jabbok, and from the wilderness as far as the Jordan.