Numbers 8:11-13

Young's Literal Translation

¹¹ and Aaron hath waved the Levites -- a wave-offering before Jehovah, from the sons of Israel, and they have been -- for doing the service of Jehovah.

¹² `And the Levites lay their hands on the head of the bullocks, and make thou the one a sin-offering, and the one a burnt-offering to Jehovah, to atone for the Levites,

¹³ and thou hast caused the Levites to stand before Aaron, and before his sons, and hast waved them -- a wave-offering to Jehovah;