Joseph and the Angel

Mary was engaged to a young man named Joseph. When Joseph found out that Mary was with child, he sought to have her put away in secret, as he was a thoughtful man and didn’t want Mary to be publicly disgraced. But an Angel of the Lord appeared to him in a dream and told him not to worry about taking Mary as his wife since that which was conceived in her was of the Holy Spirit.

He told Joseph, “And she will have a son, and you are to name him Jesus, for he will save his people from their sins.”
– Matthew 1:21

Joseph agreed to take Mary, a virgin, as his wife thus fulfilling the prophecy of Isaiah.