Numbers 23:3-4

3Then Balaam said to Balak, “Stand here by your burnt offerings, and I will go to see if the Lord will respond to me. Then I will tell you whatever he reveals to me.” So Balaam went alone to the top of a bare hill,

4and God met him there. Balaam said to him, “I have prepared seven altars and have sacrificed a young bull and a ram on each altar.”