Sahih al-Bukhari 5215
Sahih al-Bukhari · Book 67: Wedlock, Marriage (Nikaah) · Whoever had sexual intercourse with all his wives and then took one bath only
Narrated Anas bin Malik:
حَدَّثَنَا عَبْدُ الأَعْلَى بْنُ حَمَّادٍ ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ ، حَدَّثَنَا سَعِيدٌ ، عَنْ قَتَادَةَ ، أَنَّ أَنَسَ بْنَ مَالِكٍ ، حَدَّثَهُمْ أَنَّ نَبِيَّ اللَّهِ صلى الله عليه وسلم كَانَ يَطُوفُ عَلَى نِسَائِهِ فِي اللَّيْلَةِ الْوَاحِدَةِ، وَلَهُ يَوْمَئِذٍ تِسْعُ نِسْوَةٍ.
The Prophet (ﷺ) used to pass by (have sexual relation with) all his wives in one night, and at that time he had nine wives.