Deuteronomy 3:8

“At that time we took the land from the two Amorite kings across the Jordan, from the Arnon Valley as far as Mount Hermon,

Joshua 12:2-6

Sihon king of the Amorites lived in Heshbon. He ruled over the territory from Aroer on the rim of the Arnon Valley, along the middle of the valley, and half of Gilead up to the Jabbok River (the border of the Ammonites),

Joshua 13:9-12

From Aroer on the rim of the Arnon Valley, along with the city in the middle of the valley, all the Medeba plateau as far as Dibon,

Numbers 32:33-42

So Moses gave them—the Gadites, Reubenites, and half the tribe of Manasseh son of Joseph—the kingdom of Sihon king of the Amorites and the kingdom of Og king of Bashan, the land including its cities with the territories surrounding them.

Treasury of Scripture Knowledge

Summary

And we took at that time out of the hand of the two kings of the Amorites the land that was on this side Jordan, from the river of Arnon unto mount Hermon;

Bible References

The land

Numbers 32:33
So Moses gave them—the Gadites, Reubenites, and half the tribe of Manasseh son of Joseph—the kingdom of Sihon king of the Amorites and the kingdom of Og king of Bashan, the land including its cities with the territories surrounding them.
Joshua 12:2
Sihon king of the Amorites lived in Heshbon. He ruled over the territory from Aroer on the rim of the Arnon Valley, along the middle of the valley, and half of Gilead up to the Jabbok River (the border of the Ammonites),
Joshua 13:9
From Aroer on the rim of the Arnon Valley, along with the city in the middle of the valley, all the Medeba plateau as far as Dibon,

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.