Verse 7 “Then shalt thou take the anointing oil, and pour it upon his head, and anoint him.”
The high priest, in his dedication, had oil poured upon him. Oil is a symbol of the Holy Spirit. Those who would minister for the Lord must have power that comes from God. A pre-Pentecost promise of the Lord Jesus to the early New Testament Christians was that, “Ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judea, and in Samaria, and unto the uttermost part of the earth” (Acts 1:8).