Al-Kāfi
Hadith 19093- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ الأشْعَرِيِّ عَنِ ابْنِ الْقَدَّاحِ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ (عَلَيْهِ السَّلام) إِذَا جَامَعَ أَحَدُكُمْ فَلْيَقُلْ بِسْمِ اللهِ وَبِاللهِ اللهُمَّ جَنِّبْنِي الشَّيْطَانَ وَجَنِّبِ الشَّيْطَانَ مَا رَزَقْتَنِي قَالَ فَإِنْ قَضَى اللهُ بَيْنَهُمَا وَلَداً لا يَضُرُّهُ الشَّيْطَانُ بِشَيْءٍ أَبَداً.
3. A number of our people have narrated from Sahl ibn Ziyad from Ja’far ibn Muhammad al-Ash’ariy from ibn al-Qaddah who has said the following: “Abu ‘Abd Allah (a.s.), has said that ’Amir al-Mu’minin, has said, ‘When one of you goes to bed with his wife he should say, “In the name of Allah, by the help of Allah, O Lord, keep Satan away from me and from what You have granted me.’ He (the Imam) said, ‘If Allah decides to grant them a child Satan will never be able to harm the child.’”