Numbers 8:12-14

Revised Standard Version Catholic Edition

¹² Then the Levites shall lay their hands upon the heads of the bulls; and you shall offer the one for a sin offering and the other for a burnt offering to the Lord, to make atonement for the Levites. ¹³ And you shall cause the Levites to attend Aaron and his sons, and shall offer them as a wave offering to the Lord.

¹⁴ “Thus you shall separate the Levites from among the people of Israel, and the Levites shall be mine.