Exodus 40:10

You shall set the basin between the Tent of Meeting and the altar, and shall put water therein.

You shall set up the court around it, and hang up the screen of the gate of the court.

“You shall take the anointing oil, and anoint the tabernacle and all that is in it, and shall make it holy, and all its furniture, and it will be holy.

You shall anoint the basin and its base, and sanctify it.

“You shall bring Aaron and his sons to the door of the Tent of Meeting, and shall wash them with water.

You shall put on Aaron the holy garments; and you shall anoint him, and sanctify him, that he may minister to me in the priest’s office.