Luke 1:34-38

34 Mary said to the angel, "How can this be, seeing I am a virgin?"

35 The angel answered her, "The Holy Spirit will come on you, and the power of the Most High will overshadow you. Therefore also the holy one who is born from you will be called the Son of God.  36 Behold, Elizabeth, your relative, also has conceived a son in her old age; and this is the sixth month with her who was called barren.  37 For everything spoken by God is possible."

38 Mary said, "Behold, the handmaid of the Lord; be it to me according to your word."  The angel departed from her.