Journey of Israel Through The Desert: Across the Arnon
Source: TTT
Numbers 21:13–15
From there they moved on and camped on the other side of the Arnon, in the wilderness that extends into the Amorite territory. Now the Arnon is the border between the Moabites and the Amorites. / Therefore it is stated in the Book of the Wars of the LORD: “Waheb in Suphah and the wadis of the Arnon, / even the slopes of the wadis that extend to the site of Ar and lie along the border of Moab.”
Deuteronomy 2:24
“Arise, set out, and cross the Arnon Valley. See, I have delivered into your hand Sihon the Amorite, king of Heshbon, and his land. Begin to take possession of it and engage him in battle.