Numbers 23:27-30

And Balak said unto Balaam, Come now, I will take thee unto another place; peradventure it will please God that thou mayest curse me them from thence. And Balak took Balaam unto the top of Peor, that looketh down upon the desert. And Balaam said unto Balak, Build me here seven altars, and prepare me here seven bullocks and seven rams. And Balak did as Balaam had said, and offered up a bullock and a ram on every altar.