Exodus 40:12-16

12And thou shalt bring Aaron and his sons near, at the entrance of the tent of meeting, and bathe them with water.

13And thou shalt clothe Aaron with the holy garments, and anoint him, and hallow him, that he may serve me as priest.

14And thou shalt bring his sons near, and clothe them with vests.

15And thou shalt anoint them, as thou didst anoint their father, that they may serve me as priests. And their anointing shall be to them an everlasting priesthood throughout their generations.

16And Moses did so: as Jehovah had commanded him, so did he.