Luke 1:27, 31-32, 34-35
27 To a virgin engaged to a man named Joseph, of the house of David; and the virgin's name was Mary.
31 And behold, you will conceive in your womb and bear a son, and you shall call His name Jesus.
32 He will be great and will be called Son of the Most High; and the Lord God will give to Him the throne of David His father,
34 But Mary said to the angel, How will this be, since I have not known a man?
35 And the angel answered and said to her, The Holy Spirit will come upon you, and the power of the Most High will overshadow you; therefore also the holy thing which is born will be called the Son of God.