Exodus 29:8-10

New Revised Standard Version Catholic Edition

⁸ Then you shall bring his sons, and put tunics on them, ⁹ and you shall gird them with sashes^[a] and tie headdresses on them; and the priesthood shall be theirs by a perpetual ordinance. You shall then ordain Aaron and his sons.

¹⁰ You shall bring the bull in front of the tent of meeting. Aaron and his sons shall lay their hands on the head of the bull,