Charles Ellicott Commentary Numbers 23:3

"And Balaam said unto Balak, Stand by thy burnt-offering, and I will go: peradventure Jehovah will come to meet me; and whatsoever he showeth me I will tell thee. And he went to a bare height." — Numbers 23:3 (ASV)

To a high place. —Rather, to a bare or barren height; pagan augurs were accustomed to choose elevated places for their auspices, with an extensive view, especially the barren summits of mountains.