The birth of Jesus Christ came about this way: After his mother Mary had been engaged to Joseph, it was discovered before they came together that she was pregnant from the Holy Spirit. So her husband, being a righteous man and not wanting to disgrace her publicly, decided to divorce her secretly.
But after he had considered these thing, an angel of the Lord appeared to him in a dream, saying, "Joseph, son of David, don't be afraid to take Mary as your wife, because what has been conceived in her is from the Holy Spirit. She will give birth to a son, and you are to name him Jesus, because he will save his people from their sins."
Now all this took place to fulfill what was spoken by the Lord through the prophet:
But after he had considered these thing, an angel of the Lord appeared to him in a dream, saying, "Joseph, son of David, don't be afraid to take Mary as your wife, because what has been conceived in her is from the Holy Spirit. She will give birth to a son, and you are to name him Jesus, because he will save his people from their sins."
Now all this took place to fulfill what was spoken by the Lord through the prophet:
See, the virgin will become pregnant
and give birth to a son,
and they will name him Immanuel,
which is translated “God is with us.”and give birth to a son,
and they will name him Immanuel,
Matthew 1:18-23 CSB
I've been spending some quality time in Matthew recently.
There are five fulfillment passages that open his gospel following the genealogy.
Each of them controversial in their own way.
This first one is controversial due to the translation of the text of Isaiah from which it is drawn.
Therefore the Lord himself shall give you a sign;
Behold, a Virgin shall conceive, and bear a Son,
And shall call his name Immanuel. (Isaiah 7:14 AV1874)
Behold, a Virgin shall conceive, and bear a Son,
And shall call his name Immanuel. (Isaiah 7:14 AV1874)
Therefore the Lord himself will give you a sign.
Behold, a young woman shall conceive and bear a son,
and shall call his name Immanu-el. (Isaiah 7:14 RSV)
Behold, a young woman shall conceive and bear a son,
and shall call his name Immanu-el. (Isaiah 7:14 RSV)
The common versions are of one mind when translating this verse.