Language:
كتاب الأدب
78  
Good Manners and Form (Al-Adab)
(68)
Chapter: Smiling and laughing
(68)
باب التَّبَسُّمِ وَالضَّحِكِ
Sahih al-Bukhari 6091

Narrated Zainab bint Um Salama:

Um Sulaim said, "O Allah's Messenger (ﷺ)! Verily Allah is not shy of (telling you) the truth. Is it essential for a woman to take a bath after she had a wet dream (nocturnal sexual discharge)?" He said, "Yes, if she notices discharge. On that Um Salama laughed and said, "Does a woman get a (nocturnal sexual) discharge?" He said, "How then does (her) son resemble her (his mother)?"

حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا يَحْيَى، عَنْ هِشَامٍ، قَالَ أَخْبَرَنِي أَبِي، عَنْ زَيْنَبَ بِنْتِ أُمِّ سَلَمَةَ، عَنْ أُمِّ سَلَمَةَ، أَنَّ أُمَّ سُلَيْمٍ، قَالَتْ يَا رَسُولَ اللَّهِ إِنَّ اللَّهَ لاَ يَسْتَحِي مِنَ الْحَقِّ، هَلْ عَلَى الْمَرْأَةِ غُسْلٌ إِذَا احْتَلَمَتْ قَالَ ‏"‏ نَعَمْ إِذَا رَأَتِ الْمَاءَ ‏"‏‏.‏ فَضَحِكَتْ أُمُّ سَلَمَةَ فَقَالَتْ أَتَحْتَلِمُ الْمَرْأَةُ فَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ فَبِمَ شَبَهُ الْوَلَدِ ‏"‏‏.‏
Reference : Sahih al-Bukhari 6091
In-book reference : Book 78, Hadith 118
USC-MSA web (English) reference : Vol. 8, Book 73, Hadith 113
  (deprecated numbering scheme)