Numbers 8:11-13

WEB_Strongs(i)
  11 H175 and Aaron H5130 shall offer H3881 the Levites H6440 before H3068 Yahweh H8573 for a wave offering, H1121 on the behalf of the children H3478 of Israel, H5647 that it may be theirs to do H5656 the service H3068 of Yahweh.
  12 H3881 "The Levites H5564 shall lay H3027 their hands H7218 on the heads H6499 of the bulls, H6213 and you shall offer H259 the one H2403 for a sin offering, H259 and the other H2403 for a burnt offering H3068 to Yahweh, H3722 to make atonement H3881 for the Levites.
  13 H5975 You shall set H3881 the Levites H6440 before H175 Aaron, H6440 and before H1121 his sons, H5130 and offer H8573 them as a wave offering H3068 to Yahweh.