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swirlie It's in the Bible..
Here OT::
(Isaiah 7:14) "Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel."
Here in the Gospel of Matthew::
(Matthew 1:22-25) "Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying, {23} Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us. {24} Then Joseph being raised from sleep did as the angel of the Lord had bidden him, and took unto him his wife: {25} And knew her not till she had brought forth her firstborn son: and he called his name JESUS."