عَنْ عَبْدِ اللَّهِ بْنِ أَبِي قَيْسٍ قَالَ سَأَلْتُ عَائِشَةَ كَيْفَ كَانَ نَوْمُ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي الْجَنَابَةِ أَيَغْتَسِلُ قَبْلَ أَنْ يَنَامَ أَوْ يَنَامُ قَبْلَ أَنْ يَغْتَسِلَ قَالَتْ كُلُّ ذَلِكَ قَدْ كَانَ يَفْعَلُ رُبَّمَا اغْتَسَلَ فَنَامَ وَرُبَّمَا تَوَضَّأَ فَنَامَ(نسائی: ۴۰۴)
Translation
Hazrat Abdullah bin Abu Qais (may Allah be pleased with him) narrated, he said: I asked Hazrat Aisha (may Allah be pleased with her) how the Messenger of Allah (PBUH) used to sleep in the state of Janabah (major ritual impurity)? Did He (PBUH) take a bath before sleeping or sleep before taking a bath? She said: He (PBUH) used to do both. Sometimes He would take a bath and then sleep, and sometimes He would only perform ablution (Wudu) and then sleep.