Numbers 8:12

8:12 When the Levites lay their hands on the heads of the bulls, offer the one for a purification offering and the other for a whole burnt offering to the Lord, to make atonement for the Levites.

Numbers 24:10

24:10 Then Balak became very angry at Balaam, and he struck his hands together. Balak said to Balaam, “I called you to curse my enemies, and look, you have done nothing but bless them these three times!