Numbers 23:1
Then Balaam said to Balak, "Build me seven altars here, and prepare for me seven bulls and seven rams."

Numbers 23:3
"Stay here by your burnt offering while I am gone," Balaam said to Balak. "Perhaps the LORD will meet with me. And whatever He reveals to me, I will tell you." So Balaam went off to a barren height,

Ezekiel 45:23
Each day during the seven days of the feast, he shall provide seven bulls and seven rams without blemish as a burnt offering to the LORD, along with a male goat for a sin offering.