Luke 1:35-37

Then the angel replied to her, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you [like a cloud]; for that reason the holy (pure, sinless) Child shall be called the Son of God. [Ex 40:34; Is 7:14] And listen, even your relative Elizabeth has also conceived a son in her old age; and she who was called barren is now in her sixth month. For with God nothing [is or ever] shall be impossible.”