Exodus 29:4-7

4“You are to present Aaron and his sons at the entrance of the tent of meeting. You are to wash them with water

5and take the garments and clothe Aaron with the tunic, the robe of the ephod, the ephod, and the breastpiece; you are to fasten the ephod on him by using the skillfully woven waistband.

6You are to put the turban on his head and put the holy diadem on the turban.

7You are to take the anointing oil and pour it on his head and anoint him.