وَعَنِ ابْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا
قَالَ: قَالَ رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -«لَوْ أَنَّ أَحَدَكُمْ إِذَا أَرَادَ أَنْ يَأْتِيَ أَهْلَهُ قَالَ: بِسْمِ اَللَّهِ. اَللَّهُمَّ جَنِّبْنَا اَلشَّيْطَانَ وَجَنِّبِ الشَّيْطَانَ مَا رَزَقْتَنَا ; فَإِنَّهُ إِنْ يُقَدَّرْ بَيْنَهُمَا وَلَدٌ فِي ذَلِكَ، لَمْ يَضُرَّهُ اَلشَّيْطَانُ أَبَدًا»
The Messenger of Allah (sallallahu alayhi wa sallam) said: “If anyone who intends to have intercourse with his wife says, ‘In the Name of Allah. O Allah, keep us away from the devil and keep the devil away from what You have provided us (of children)’, should it be ordained that a child be born to them thereby, Satan will never harm it.”.
Bulugh al-Maram 1187, Book 8, Marriage, Hadith 65. 1 min read