Bede the Venerable
Catena Aurea · Lukasevangelium 24
Then opened he their understanding, that they might understand the Scriptures, And said unto them, Thus it is written, and thus it behoved Christ to suffer, and to rise from the dead the third day: And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem. And ye are witnesses of these things. And, behold, I send the promise of my Father upon you: but tarry ye in the city of Jerusalem, until ye be endued with power from on high.
But concerning the power, that is, the Holy Spirit, the Angel also says to Mary, And the power of the Highest shall overshadow thee. (Luke 1:35.) And the Lord Himself says elsewhere, For I know that virtue is gone out of me. (Luke 8:45.)