وَعَنْهَا أَيْضًا قَالَتْ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ رُبَّمَا أَوْتَرَ قَبْلَ أَنْ يَنَامَ، وَرُبَّمَا أَوْتَرَ بَعْدَ أَنْ يَنَامَ، وَرُبَّمَا اغْتَسَلَ قَبْلَ أَنْ يَنَامَ، وَرُبَّمَا نَامَ قَبْلَ أَنْ يَغْتَسِلَ مِنَ الْجَنَابَةِ
It is narrated from Sayyida Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) would sometimes perform Witr before sleeping and sometimes after sleeping. Similarly, he would sometimes perform the ritual bath (ghusl) of janabah before sleeping and sometimes he would sleep before performing this bath.