Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah Narrated Ibn ‘Abbas (Radi-Allahu ‘anhu):

The Prophet (Sallallahu ‘Alaihi Wa Sallam) said, “If anyone of you, when having sexual relation with his wife, say: ‘In the name of Allah. O Allah! Protect us from Satan and prevent Satan from approaching our offspring you are going to give us,’ and if he begets a child (as a result of that relation) Satan will not harm it.”

Bukhari Vol. 4 : No. 493