أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا خَالِدٌ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي بَكْرِ بْنِ حَفْصٍ، سَمِعْتُ أَبَا سَلَمَةَ، يَقُولُ دَخَلْتُ عَلَى عَائِشَةَ - رضى الله عنها - وَأَخُوهَا مِنَ الرَّضَاعَةِ فَسَأَلَهَا عَنْ غُسْلِ النَّبِيِّ صلى الله عليه وسلم فَدَعَتْ بِإِنَاءٍ فِيهِ مَاءٌ قَدْرَ صَاعٍ وَسَتَرَتْ سِتْرًا فَاغْتَسَلَتْ فَأَفْرَغَتْ عَلَى رَأْسِهَا ثَلاَثًا .
It was narrated from Abu Bakr bin Hafs: "I heard Abu Salamah say: 'I entered upon 'Aishah and her foster-brother was with her. He asked her about the Ghusl of the Prophet (PBUH). She called for a vessel in which was a Sa' of water, then she concealed herself and performed Ghusl and poured water over her head three times.'" Translation Not Available
Book Ref: Sunan An Nisai Book 1 Hadith 228
Web Ref: Sunan An Nisai Not Available