I along with the foster brother of 'A'isha went to her and he asked about the bath of the Apostle ﷺ because of sexual intercourse. She called for a vessel equal to a Sa' and she took a bath. and there was a curtain between us and her. She poured water on her head thrice and he (Abu Salama) said: The wives of the Apostle ﷺ collectedhair on their heads and these lopped up to ears (and did rot go beyond that).  

دَخَلْتُ عَلَى عَائِشَةَ أَنَا وَأَخُوهَا مِنَ الرَّضَاعَةِ فَسَأَلَهَا عَنْ غُسْلِ النَّبِيِّ ﷺ مِنَ الْجَنَابَةِ فَدَعَتْ بِإِنَاءٍ قَدْرِ الصَّاعِ فَاغْتَسَلَتْ وَبَيْنَنَا وَبَيْنَهَا سِتْرٌ وَأَفْرَغَتْ عَلَى رَأْسِهَا ثَلاَثًا قَالَ وَكَانَ أَزْوَاجُ النَّبِيِّ ﷺ يَأْخُذْنَ مِنْ رُءُوسِهِنَّ حَتَّى تَكُونَ كَالْوَفْرَةِ  

[Machine] I heard Abu Salama say that both Aisha and I entered from outside onto Aisha, and her brother asked her about the washings of the Messenger of Allah ﷺ, so she called for a container that was about a sa' in capacity, and she washed and poured it onto her head three times while there was a curtain between us and her.  

سَمِعْتُ أَبَا سَلَمَةَ يَقُولُ دَخَلْتُ أَنَا وَأَخُو عَائِشَةَ مِنَ الرَّضَاعَةِ عَلَى عَائِشَةَ فَسَأَلَهَا أَخُوهَا عَنْ غُسْلِ رَسُولِ اللهِ ﷺ فَدَعَتْ بِإِنَاءٍ نَحْوًا مِنْ صَاعٍ فَاغْتَسَلَتْ وَأَفْرَغَتْ عَلَى رَأْسِهَا ثَلَاثًا وَبَيْنَنَا وَبَيْنَهَاالْحِجَابُ  

"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»