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.

Therefore it is said in the Book of the Wars of the LORD, What he did in the Red Sea, and in the brooks of Arnon,

And Israel struck him with the edge of the sword, and possessed his land from Arnon unto Jabbok, even unto the children of Ammon: for the border of the children of Ammon was fortified.

For Heshbon was the city of Sihon the king of the Amorites, who had fought against the former king of Moab, and taken all his land out of his hand, even unto Arnon.

For there is a fire gone out of Heshbon, a flame from the city of Sihon: it has consumed Ar of Moab, and the lords of the high places of Arnon.

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.