Luke 1:35

35 The angel answered, "The Holy Spirit will come on you, and God's power will rest upon you. For this reason the holy child will be called the Son of God.

Luke 1:35 In-Context

33 and he will be the king of the descendants of Jacob forever; his kingdom will never end!"
34 Mary said to the angel, "I am a virgin. How, then, can this be?"
35 The angel answered, "The Holy Spirit will come on you, and God's power will rest upon you. For this reason the holy child will be called the Son of God.
36 Remember your relative Elizabeth. It is said that she cannot have children, but she herself is now six months pregnant, even though she is very old.
37 For there is nothing that God cannot do."
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.