Mateus 1:20-25 - Bíblia Online

But while he was thinking about these things, behold, an angel of the Lord appeared to him in a dream, saying, "Joseph, son of David, do not fear to take unto [you] Mary your wife, for that which is begotten in her is of the Holy Spirit. 
And she shall bring forth a Son, and you shall call His name JESUS, for He shall save His people from their sins." 
Now all this came to pass that the thing spoken by the Lord through the prophet might be fulfilled, saying, 
"Behold, the virgin shall be with child, and shall bring forth a Son, and they shall call His name Immanuel,"which is translated, "God with us." 
Then Joseph, having been aroused from sleep, did as the angel of the Lord had ordered him and took to [him] his wife, 
but did not know her till she brought forth her firstborn Son. And he called His name JESUS. 

Mateus 2

But while he was thinking about these things, behold, an angel of the Lord appeared to him in a dream, saying, "Joseph, son of David, do not fear to take unto [you] Mary your wife, for that which is begotten in her is of the Holy Spirit. 
And she shall bring forth a Son, and you shall call His name JESUS, for He shall save His people from their sins." 
Now all this came to pass that the thing spoken by the Lord through the prophet might be fulfilled, saying, 
"Behold, the virgin shall be with child, and shall bring forth a Son, and they shall call His name Immanuel,"which is translated, "God with us." 
Then Joseph, having been aroused from sleep, did as the angel of the Lord had ordered him and took to [him] his wife, 
but did not know her till she brought forth her firstborn Son. And he called His name JESUS. 

Mateus 2