"I remember performing Ghusl - myself and the Messenger of Allah ﷺ, from this" - a vessel like a Sa' or smaller. "We both started taking water from it and I poured water over my head with my hand, three times, without undoing any of my hair."  

لَقَدْ رَأَيْتُنِي أَغْتَسِلُ أَنَا وَرَسُولُ اللَّهِ ﷺ مِنْ هَذَا فَإِذَا تَوْرٌ مَوْضُوعٌ مِثْلُ الصَّاعِ أَوْ دُونَهُ فَنَشْرَعُ فِيهِ جَمِيعًا فَأُفِيضُ عَلَى رَأْسِي بِيَدَىَّ ثَلاَثَ مَرَّاتٍ وَمَا أَنْقُضُ لِي شَعْرًا