Exodus 40:15 KJV
And thou shalt anoint them, as thou didst anoint their father, that they may minister unto me in the priest’s office: for their anointing shall surely be an everlasting priesthood throughout their generations.
Exodus 40:15, King James Version
In context
14 And thou shalt bring his sons, and clothe them with coats:
15 And thou shalt anoint them, as thou didst anoint their father, that they may minister unto me in the priest’s office: for their anointing shall surely be an everlasting priesthood throughout their generations.
16 Thus did Moses: according to all that the Lord commanded him, so did he.