Sahih al-Bukhari 287

Arabic

حَدَّثَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، سَأَلَ رَسُولَ اللَّهِ صلى الله عليه وسلم أَيَرْقُدُ أَحَدُنَا وَهْوَ جُنُبٌ قَالَ ‏ "‏ نَعَمْ إِذَا تَوَضَّأَ أَحَدُكُمْ فَلْيَرْقُدْ وَهُوَ جُنُبٌ ‏"‏‏.‏

English translation

Narrated `Umar bin Al-Khattab:I asked Allah's Messenger (ﷺ) "Can any one of us sleep while he is Junub?" He replied, "Yes, if he performs ablution, he can sleep while he is Junub

Reference: Sahih al-Bukhari 287, Book of Bathing (Ghusl). English translation by Dr. Muhammad Muhsin Khan.