Numbers 8:11-13

American Standard Version

¹¹ and Aaron shall ^[a]offer the Levites before Jehovah for a wave-offering, ^[b]on the behalf of the children of Israel, that it may be theirs to do the service of Jehovah. ¹² And the Levites shall lay their hands upon the heads of the bullocks: and offer thou the one for a sin-offering, and the other for a burnt-offering, unto Jehovah, to make atonement for the Levites. ¹³ And thou shalt set the Levites before Aaron, and before his sons, and offer them for a wave-offering unto Jehovah.