The Book of Marriage
Ṣaḥīḥ Muslim 3533
لَوْ أَنَّ أَحَدَهُمْ إِذَا أَرَادَ أَنْ يَأْتِيَ أَهْلَهُ قَالَ بِاسْمِ اللَّهِ اللَّهُمَّ جَنِّبْنَا الشَّيْطَانَ وَجَنِّبِ الشَّيْطَانَ مَا رَزَقْتَنَا فَإِنَّهُ إِنْ يُقَدَّرْ بَيْنَهُمَا وَلَدٌ فِي ذَلِكَ لَمْ يَضُرَّهُ شَيْطَانٌ أَبَدًا
law anna aḥadahum idhā arāda an yaʾtiya ahlah qāla bāsmi-Llāh Allāhumma jannibnā ash-shayṭāna wajannibi ash-shayṭāna mā razaqtanā fa-innah in yuqaddar baynahumā waladun fī dhalika lam yaḍurrah shayṭānun abadan
Transliteration generated from the Arabic vowel marks
The full narration
Ibn" Abbas (Allah be pleased with thern) reported that Allah's Messenger (ﷺ) said:If anyone amongst you intends to go to his wife he should say: In the name of Allah,0 Allah protect us against Satan and keep away the Satan from the one that you have bestowed upon us, and if He has ordained a male child for them, Satan will never be able to do any harm to him
Source
Ṣaḥīḥ Muslim · 3533