Question:  What is the ruling on praying two Rak'ahs before having sexual intercourse on the wedding night?

Answer:  Some of the Companions, may Allah be pleased with them, prayed two Rak'ahs before having sexual intercourse with their wives on the first night. But I know of no authentic Sunnah from the Messenger of Allah - Sallallahu alaihi wasallam- regarding this. The Sunnah is to touch the women on the forehead and ask Allah for her goodness and the goodness of that she brings to him, and to seek refuge with Allah from her evil and the evil of what is ordained for him. And if he fears in this case that the woman will run away from him, he should touch her forehead, as if he wants to draw close to her and kiss her, then supplicate to Allah with supplication in secret, so that she does not hear it, because some women might imagine something (bad) if she heard her husband saying: I seek refuge with You from her evil and the evil of what is ordained for him, and say: Is there evil in me?

Shaykh Muhammad bin Saalih al-`Uthaymeen

Fatawa Islamiyah Page no. 178 Vol: 5