Numbers 23:27-30

Balak said to Balaam, “Please, let me take you to another place; maybe we can find the right place in God’s eyes where you’ll be able to curse them for me.” So Balak took Balaam to the top of Peor, with a vista over the Jeshimon (Wasteland). Balaam said to Balak, “Build seven altars for me here and prepare seven bulls and seven rams for sacrifice.” Balak did it and presented an offering of a bull and a ram on each of the altars.