Sahih Muslim 336cBook 3, Hadith 88
وَحَدَّثَنَاهُ أَبُو كُرَيْبٍ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنِ الْوَلِيدِ بْنِ كَثِيرٍ، عَنْ سَعِيدِ بْنِ أَبِي هِنْدٍ، بِهَذَا الإِسْنَادِ وَقَالَ فَسَتَرَتْهُ ابْنَتُهُ فَاطِمَةُ بِثَوْبِهِ فَلَمَّا اغْتَسَلَ أَخَذَهُ فَالْتَحَفَ بِهِ ثُمَّ قَامَ فَصَلَّى ثَمَانَ سَجَدَاتٍ وَذَلِكَ ضُحًى .
His (the Holy Prophet's) daughter Fatimah provided him privacy with the help of his cloth, and when he had taken a bath he took it up and wrapped it around him and then stood and offered eight rak'ahs of the forenoon prayer.