Leviticus 7:36

The Lord commanded this to be given to the priests by the Israelites on the day that He anointed them. It is their portion perpetually throughout their generations.’”

Leviticus 8:12

Then he poured some of the anointing oil on Aaron’s head and anointed him, to consecrate him.

Leviticus 8:30

So Moses took some of the anointing oil and some of the blood which was on the altar and sprinkled it on Aaron and his garments, and also on his sons and their garments with him; so Moses consecrated Aaron and his garments, and his sons and his sons’ garments with him.

Exodus 40:13-15

You shall put the holy garments on Aaron and anoint him and consecrate him, that he may serve as a priest to Me.

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
Then he poured some of the anointing oil on Aaron’s head and anointed him, to consecrate him.
Exodus 40:13
You shall put the holy garments on Aaron and anoint him and consecrate him, that he may serve as a priest to Me.