Numbers 8:12-14

Young's Literal Translation

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;

¹⁴ and thou hast separated the Levites from the midst of the sons of Israel, and the Levites have become Mine;