Exodus 29:4-7

4Then present Aaron and his sons at the entrance to the Tent of Meeting and wash them with water. 5Take the garments and clothe Aaron with the tunic, the robe of the ephod, the ephod itself, and the breastplate. Fasten the ephod on him with its woven waistband. 6Put the turban on his head and attach the holy diadem to the turban. 7Then take the anointing oil and anoint him by pouring it on his head.