Deuteronomy 3:8
And we took the land at that time out of the hand of the two kings of the Amorites that were beyond the Jordan, from the valley of the Arnon unto mount Hermon;
Joshua 12:2-6
Sihon king of the Amorites, who dwelt in Heshbon, and ruled from Aroer, which is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and half Gilead, even unto the river Jabbok, the border of the children of Ammon;
Joshua 13:9-12
from Aroer, that is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and all the plain of Medeba unto Dibon;
Numbers 32:33-42
And Moses gave unto them, even to the children of Gad, and to the children of Reuben, and unto the half-tribe of Manasseh the son of Joseph, the kingdom of Sihon king of the Amorites, and the kingdom of Og king of Bashan, the land, according to the cities thereof with their borders, even the cities of the land round about.