Numbers 23:1-2, 29

Then Balaam said to Balak, “Build seven altars for me here, and prepare for me seven bulls and seven rams here.” Balak did just as Balaam had said, and Balak and Balaam offered a bull and a ram on each altar.

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