Bathing (Ghusl)
5/27. Chapter:
A Junub person should perform ablution before sleeping
Sahih Bukhari
حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي جَعْفَرٍ، عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، قَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم إِذَا أَرَادَ أَنْ يَنَامَ وَهْوَ جُنُبٌ، غَسَلَ فَرْجَهُ، وَتَوَضَّأَ لِلصَّلاَةِ.
Narrated `Aisha: Whenever the Prophet (ﷺ) intended to sleep while he was Junub, he used to wash his private parts and perform ablution like that for the prayer.
Reference : Sahih al-Bukhari 288In-book reference : Book 5, Hadith 40USC-MSA web (English) reference : Vol. 1, Book 5, Hadith 286