Numbers 8:9-11

Revised Standard Version

⁹ And you shall present the Levites before the tent of meeting, and assemble the whole congregation of the people of Israel. ¹⁰ When you present the Levites before the Lord, the people of Israel shall lay their hands upon the Levites, ¹¹ and Aaron shall offer the Levites before the Lord as a wave offering from the people of Israel, that it may be theirs to do the service of the Lord.