Matthew 1:18-23

18 Now the birth of Jesus Christ was like this; for after his mother, Mary, was engaged to Joseph, before they came together, she was found pregnant by the Holy Spirit.  19 Joseph, her husband, being a righteous man, and not willing to make her a public example, intended to put her away secretly.  20 But when he thought about these things, behold, an angel of the Lord appeared to him in a dream, saying, "Joseph, son of David, don't be afraid to take to yourself Mary, your wife, for that which is conceived in her is of the Holy Spirit.  21 She shall bring forth a son. You shall call his name Jesus, for it is he who shall save his people from their sins."

22 Now all this has happened, that it might be fulfilled which was spoken by the Lord through the prophet, saying,

23 "Behold, the virgin shall be with child,  And shall bring forth a son.  They shall call his name Immanuel;"  Which is, being interpreted, "God with us."