"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 ﷺ. 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.'" (Using translation from Nasāʾī 227)
سَمِعْتُ أَبَا سَلَمَةَ يَقُولُ دَخَلْتُ عَلَى عَائِشَةَ وَأَخُوهَا مِنَ الرَّضَاعَةِ فَسَأَلَهَا عَنْ غُسْلِ النَّبِيِّ ﷺ؟ «فَدَعَتْ بِإِنَاءٍ فِيهِ قَدْرُ صَاعٍ فَسَتَرَتْ سِتْرًا فَأَفْرَغَتْ عَلَى رَأْسِهَا ثَلَاثًا»