Exodus 29:4-9

Bring Aaron and his sons to the entrance of the Meeting Tent and wash them with water. Take the clothes and dress Aaron in the inner robe and the outer robe of the holy vest. Then put on him the holy vest and the chest covering, and tie the holy vest on him with its skillfully woven belt. Put the turban on his head, and put the holy crown on the turban. Take the special olive oil and pour it on his head to make him a priest. “Then bring his sons and put the inner robes on them. Put the headbands on their heads, and tie cloth belts around their waists. Aaron and his descendants will be priests in Israel, according to a rule that will continue from now on. This is how you will appoint Aaron and his sons as priests.