ʿAisha's brother and I went to ʿAisha and he asked her about the bath of the Prophet. She brought a pot containing about a Saʿ of water and took a bath and poured it over her head and at that time there was a screen between her and us.  

سَمِعْتُ أَبَا سَلَمَةَ يَقُولُ دَخَلْتُ أَنَا وَأَخُو عَائِشَةَ عَلَى عَائِشَةَ فَسَأَلَهَا أَخُوهَا عَنْ غُسْلِ النَّبِيِّ ﷺ فَدَعَتْ بِإِنَاءٍ نَحْوًا مِنْ صَاعٍ فَاغْتَسَلَتْ وَأَفَاضَتْ عَلَى رَأْسِهَا وَبَيْنَنَا وَبَيْنَهَا حِجَابٌ قَالَ أَبُو عَبْدِ اللَّهِ قَالَ يَزِيدُ بْنُ هَارُونَ وَبَهْزٌ وَالْجُدِّيُّ عَنْ شُعْبَةَ قَدْرِ صَاعٍ  

While I and my father were with Jabir bin ʿAbdullah, some people asked him about taking a bath. He replied, "A Saʿ of water is sufficient for you." A man said, "A Saʿ is not sufficient for me." Jabir said, "A Saʿ was sufficient for one who had more hair than you and was better than you (meaning the Prophet)." And then Jabir (put on) his garment and led the prayer.  

جَابِرٌ كَانَ يَكْفِي مَنْ هُوَ أَوْفَى مِنْكَ شَعَرًا وَخَيْرٌ مِنْكَ ثُمَّ أَمَّنَا فِي ثَوْبٍ  

The Prophet ﷺ and Maimuna used to take a bath from a single pot.  

أَنَّ النَّبِيَّ ﷺ وَمَيْمُونَةَ كَانَا يَغْتَسِلاَنِ مِنْ إِنَاءٍ وَاحِدٍ قَالَ أَبُو عَبْدِ اللَّهِ كَانَ ابْنُ عُيَيْنَةَ يَقُولُ أَخِيرًا عَنِ ابْنِ عَبَّاسٍ عَنْ مَيْمُونَةَ وَالصَّحِيحُ مَا رَوَى أَبُو نُعَيْمٍ