Leviticus 7:36

The LORD commanded this to be given them by the people of Israel, from the day that he anointed them. It is a perpetual due throughout their generations."

Leviticus 8:12

And he poured some of the anointing oil on Aaron's head and anointed him to consecrate him.

Leviticus 8:30

Then Moses took some of the anointing oil and of the blood that was on the altar and sprinkled it on Aaron and his garments, and also on his sons and his sons' garments. So he consecrated Aaron and his garments, and his sons and his sons' garments with him.

Exodus 40:13-15

and put on Aaron the holy garments. And you shall anoint him and consecrate him, that he may serve me as priest.

Treasury of Scripture Knowledge

Summary

Which the LORD commanded to be given them of the children of Israel, in the day that he anointed them, by a statute for ever throughout their generations.

Bible References

In the day

Leviticus 8:12
And he poured some of the anointing oil on Aaron's head and anointed him to consecrate him.
Exodus 40:13
and put on Aaron the holy garments. And you shall anoint him and consecrate him, that he may serve me as priest.

The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.