The Prophets - 21:91 And the woman who guarded her chastity. Indeed We breathed into her from Our spirit. And We made her and her son a sign to the whole world.
What sign is the son of Mary and his mother?
The Ornaments of Gold/43:57 When the son of Mary was shown as an example, your people immediately rejected.
The Ornaments of Gold/43:58 "They said: "Are our gods better or is he?"They said this only to argue with you. They are indeed a quarrelsome people."
The Ornaments of Gold/43:59 He was nothing but a servant to whom We showed favor. We made him an example for the Children of Israel.
The Ornaments of Gold/43:60 Had We willed, We could have turned you into angels colonizing the earth.
The Ornaments of Gold/43:61 He (Jesus) is a source of knowledge and a sign about the Hour. So do not doubt about it (the Hour) and follow me. That is the right way.

Mary/19:19 "(The angel said:) "I am a messenger from your Lord, commissioned to give you a pure son."
Mary/19:20 "He said, "How can I have a son when no human hand has touched me and I have not been unchaste?"
Mary/19:21 "It is so,"he said, "Your Lord said, ´It is easy for me. We will make him a sign for the people and a mercy from Us. This is a matter that has already been decided."

The Believers/23:50 And We made the son of Mary and his mother a sign, and We gave them shelter on a hill with a spring, suitable for habitation.