And the angel answered and said unto her, The Holy Spirit shall come upon you, and the power of the Highest shall overshadow you: therefore also that holy thing which shall be born of you shall be called the Son of God.
All Commentaries on Luke 1:35 Go To Luke 1
Cyprian of Carthage
AD 258
Whence, in the Gospel according to Luke, Gabriel says to Mary: "And the angel, answering, said to her, The Holy Spirit shall come upon thee, and the power of the Highest shall overshadow thee. Wherefore that holy thing which is born of thee shall be called the Son of God."