Exodus 40:13-15

13And 1you shall put the holy garments on Aaron and anoint him and consecrate him, so that he may serve as a priest to Me.

14You shall also bring his sons and put tunics on them;

15and you shall anoint them just as you have anointed their father, so that they may serve as priests to Me; and their anointing will 2qualify them for a 3permanent priesthood throughout their generations.”