Matthew 1:20-23

20When he had contemplated this, an angel of the Lord appeared to him in a dream and said, “Joseph, son of David, do not be afraid to take Mary as your wife, because the child conceived in her is from the Holy Spirit.

21She will give birth to a son and you will name him Jesus, because he will save his people from their sins.”

22This all happened so that what was spoken by the Lord through the prophet would be fulfilled:

23“Look! The virgin will conceive and bear a son, and they will call him Emmanuel,” which means “God with us.”