Exodus 40:15

15 and anoint them as you anointed their father, so that they can serve me in the office of cohen. Their anointing will signify that the office of cohen is theirs through all their generations."

Exodus 40:15 Meaning and Commentary

Exodus 40:15

And thou shall anoint them as thou didst anoint their
father
For Aaron was first anointed, and then his sons:

that they may minister unto me in the priest's office;
which they might not do before their anointing, though separated for it, and called unto it:

for their anointing shall surely be an everlasting priesthood
throughout their generations;
that is, this ceremony of anointing was to be used in all ages at the investiture of the high priest with his office, until the Messiah should come, who would put an end to the Aaronic priesthood; for not common priests, only the successors of the high priest, were anointed in later times; this present unction serving for all the priests that should follow in successive generations, so long as the priesthood continued.

Exodus 40:15 In-Context

13 Put the holy garments on Aharon, anoint him, and consecrate him, so that he can serve me in the office of cohen.

14 Bring his sons, put tunics on them,

15 and anoint them as you anointed their father, so that they can serve me in the office of cohen. Their anointing will signify that the office of cohen is theirs through all their generations."

16 Moshe did this - he acted in accordance with everything ADONAI had ordered him to do.

17 On the first day of the first month of the second year, the tabernacle was set up.