Deuteronomy 3:8
“So we took the land at that time from the hand of the two kings [Sihon and Og] of the Amorites who were beyond the Jordan, from the valley of the 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 edge of the valley of the [river] Arnon, both the middle of the valley and half of Gilead, and as far as the brook Jabbok, [which is] the border of the sons of Ammon;
Joshua 13:9-12
from Aroer on the edge of the valley of the [river] Arnon, and the city in the middle of the valley, and all the plain of Medeba, as far as Dibon;
Numbers 32:33-42
So Moses gave to them, to the sons of Gad and to the sons of Reuben and to the half-tribe of Manasseh the son of Joseph, the kingdom of Sihon, the king of the Amorites and the kingdom of Og, the king of Bashan, the land with its cities and territories, the cities of the surrounding land.