Sahih Muslim Book - 3, Hadith - 728

و حَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ الْعَنْبَرِيُّ قَالَ حَدَّثَنَا أَبِي قَالَ حَدَّثَنَا شُعْبَةُ عَنْ أَبِي بَكْرِ بْنِ حَفْصٍ عَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ قَالَ دَخَلْتُ عَلَى عَائِشَةَ أَنَا وَأَخُوهَا مِنْ الرَّضَاعَةِ فَسَأَلَهَا عَنْ غُسْلِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مِنْ الْجَنَابَةِ فَدَعَتْ بِإِنَاءٍ قَدْرِ الصَّاعِ فَاغْتَسَلَتْ وَبَيْنَنَا وَبَيْنَهَا سِتْرٌ وَأَفْرَغَتْ عَلَى رَأْسِهَا ثَلَاثًا قَالَ وَكَانَ أَزْوَاجُ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَأْخُذْنَ مِنْ رُءُوسِهِنَّ حَتَّى تَكُونَ كَالْوَفْرَةِ.

It was narrated that Abu Salamah bin 'Abdur-Rahman said: "I entered upon 'Aishah along with her brother through breastfeeding, and he asked her about how the Prophet (s.a.w) performed Ghusl in the case of Janabah. She called for a vessel the size of a Sa', and performed Ghusl with a screen between us and her. She poured water over her head three times. He said: "The wives of the Prophet (s.a.w) used to cut their hair so that it came down to their earlobes."