Numbers 8:11-14

The Seven Lamps

¹¹and Aaron shall offer the Levites before Jehovah for a wave-offering, on the behalf of the children of Israel, that it may be theirs to do the service of Jehovah. ¹²And 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. ¹³And thou shalt set the Levites before Aaron, and before his sons, and offer them for a wave-offering unto Jehovah.

¹⁴Thus shalt thou separate the Levites from among the children of Israel; and the Levites shall be mine.