Exodus 29:9-11

American Standard Version

⁹ And thou shalt gird them with girdles, Aaron and his sons, and bind head-tires on them: and they shall have the priesthood by a perpetual statute: and thou shalt consecrate Aaron and his sons.

¹⁰ And thou shalt bring the bullock before the tent of meeting: and Aaron and his sons shall lay their hands upon the head of the bullock. ¹¹ And thou shalt kill the bullock before Jehovah, at the door of the tent of meeting.