From there they moved, and encamped on the other side of Arnon, which is in the wilderness that extends from the border of the Amorites: for Arnon is the border of Moab, between Moab and the Amorites.
And when Balak heard that Balaam was come, he went out to meet him unto a city of Moab, which is on the border of Arnon, which is on the farthest boundary.
Rise up, take your journey, and pass over the river Arnon: behold, I have given into your hand Sihon the Amorite, king of Heshbon, and his land: begin to possess it, and contend with him in battle.
Then they went along through the wilderness, and went around the land of Edom, and the land of Moab, and came by the east side of the land of Moab, and encamped on the other side of Arnon, but came not within the border of Moab: for Arnon was the border of Moab.