Deuteronomy 3:8
And we took at that time out of the hand of the two kings of the Amorites the land on this side Jordan, from the river of Arnon to Mount Hermon,
Joshua 12:2-6
Sihon king of the Amorites, who lived in Heshbon and ruled from Aroer, which is on the bank of the river Arnon, and from the middle of the river, and from half Gilead, even to the river Jabbok, the border of the sons of Ammon;
Joshua 13:9-12
from Aroer on the bank of the river Arnon, and the city in the midst of the river, and all the plain of Medeba, to Dibon;
Numbers 32:33-42
And Moses gave to them, to the sons of Gad and to the sons of Reuben, and to the half the 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 with its cities in the borders, the cities of the land all around.