From there they journeyed and camped on the other side of the Arnon, which is in the wilderness that comes out of the border of the Amorites, for the Arnon is the border of Moab, between Moab and the Amorites.

Therefore it is said in the Book of the Wars of the Lord,
“Waheb in Suphah,
And the wadis of the Arnon,

Then Israel struck him with the edge of the sword, and took possession of his land from the Arnon to the Jabbok, as far as the sons of Ammon; for the border of the sons of Ammon was Jazer.

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

“For a fire went forth from Heshbon,
A flame from the town of Sihon;
It devoured Ar of Moab,
The dominant heights of the Arnon.

When Balak heard that Balaam was coming, he went out to meet him at the city of Moab, which is on the Arnon border, at the extreme end of the border.