Numbers 8:11

8 and have taken a bullock, a son of the herd, and its present, flour mixed with oil, -- and a second bullock a son of the herd thou dost take for a sin-offering,

9 and thou hast brought near the Levites before the tent of meeting, and thou hast assembled the whole company of the sons of Israel,

10 and thou hast brought near the Levites before Jehovah, and the sons of Israel have laid their hands on the Levites,

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;

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