Exodus 29:4-7

4Then bring Aaron and his sons to the doorway of the Tent of Meeting [out where the basin is] and wash them with water.

5Then you shall take the garments, and put on Aaron the tunic and the robe of the ephod and the ephod and the breastpiece, and wrap him with the skillfully woven sash of the ephod;

6and you shall put the turban on his head and put the holy crown on the turban.

7Then you shall take the anointing oil and pour it on his head and anoint him.