When Balak heard that Balaam was coming, he went out to meet him at the Moabite city on the Arnon border, at the edge of his territory.
Jewish Publication Society of America Version (JPS1917) - Numbers 22:36 >And when Balak heard that Balaam was come, he went out to meet him unto Ir-moab, which is on the border of Arnon, which is in the utmost part of the border.