Numbers 8:11

⁹And thou shalt bring the Levites before the tabernacle of the congregation: and thou shalt gather the whole assembly of the children of Israel together:

¹⁰And thou shalt bring the Levites before the LORD: and the children of Israel shall put their hands upon the Levites:

— Numbers 8:11 —

¹²And the Levites shall lay their hands upon the heads of the bullocks: and thou shalt offer the one for a sin offering, and the other for a burnt offering, unto the LORD, to make an atonement for the Levites.

¹³And thou shalt set the Levites before Aaron, and before his sons, and offer them for an offering unto the LORD.