King James Version (KJV)
When Balak heard that Balaam had come, he went out to meet him at the city of Moab, on the border formed by the Arnon, at the extremity of the border.
Modern English
When Balak heard that Balaam had come, he went out to meet him to the City of Moab, which is on the border of the Arnon, which is in the utmost part of the border.