Luke 1:26-27
In the sixth month, the angel Gabriel was sent from God to a town of Galilee called Nazareth, to a virgin betrothed to a man named Joseph, of the house of David, and the virgin's name was Mary.
Luke 1:34-35
But Mary said to the angel, "How can this be, since I have no
relations with a man?“  And the angel said to her in reply, "The
holy Spirit will come upon you, and the power of the Most High
will overshadow you. Therefore the child to be born will be called
holy, the Son of God.