Numbers 22:35-36

³⁵And the angel of the Lord said unto Bil'am, Go with the men; however, only the word which I will speak unto thee, that shalt thou speak: and Bil'am went with the princes of Balak.

³⁶And when Balak heard that Bil'am was come, he went out to meet him unto 'Ir-Moab, which is on the border of Arnon, which is at the outmost end of the boundary.