Narrated Ibn `Abbas: The Prophet (ﷺ) said, “If anyone of you on having sexual relations with his wife said (and he must say it before starting) ‘In the name of Allah. O Allah! Protect us from Satan and also protect what you bestow upon us (i.e. the coming offspring) from Satan, and if it is destined that they should have a child then, Satan will never be able to harm that offspring.” Sahih Sahih al-Bukhari, 141In-Book
Reference: Book 4, Hadith 7USC-MSA web (English) reference: Vol. 1, Book 4, Hadith 143 hv
