Matthew 1:21-23, 25

And she will have a son, and you are to name him Jesus, for he will save his people from their sins.” All of this occurred to fulfill the Lord’s message through his prophet: “Look! The virgin will conceive a child! She will give birth to a son, and they will call him Immanuel, which means ‘God is with us.’”

But he did not have sexual relations with her until her son was born. And Joseph named him Jesus.