Ephraem the Syrian
Aaron and his vestments are consecrated with the anointing oil and the sacrificial blood. This underscores that it is through the Holy Spirit that the priests present the offering at the holy feast.
And he poured it upon Aaron's head: and he anointed and consecrated him.
וַיִּצֹק֙ מִשֶּׁ֣מֶן הַמִּשְׁחָ֔ה עַ֖ל רֹ֣אשׁ אַהֲרֹ֑ן וַיִּמְשַׁ֥ח אֹת֖וֹ לְקַדְּשֽׁוֹ׃
2 Church Fathers comment on this verse
Aaron and his vestments are consecrated with the anointing oil and the sacrificial blood. This underscores that it is through the Holy Spirit that the priests present the offering at the holy feast.
It is important to recognize that the original example of this anointing is present in the Old Testament. When Moses conveyed God's command to his brother and designated him as high priest, he first washed him with water before anointing him. Consequently, he was referred to as an anointed one, signifying the anointing of the forebear.
Passages read together with this verse.