Joshua 12:1-2

1And these are the kings of the land, whom the children of Israel smote, and of whose land they took possession across the Jordan, toward the sun-rising, from the river Arnon to mount Hermon, and all the plain on the east:

2Sihon the king of the Amorites, who dwelt at Heshbon, [and] ruled from Aroer, which is upon the bank of the river Arnon, and from the middle of the ravine, and over half Gilead, as far as the river Jabbok, [which is] the border of the children of Ammon;