Numbers 23:1-3

Then Balaam said to Balak, “Build seven altars for me here, and prepare seven bulls and seven rams for me here.”

Balak did just as Balaam had spoken, and Balak and Balaam offered up a bull and a ram on each altar.

Then Balaam said to Balak, “Stand beside your burnt offering, and I will go; perhaps the Lord will come to meet me, and whatever He shows me I will tell you.” So he went to a bare hill.