Sunan an-Nasa'i 228
It was narrated that 'Aishah said:
"The Messenger of Allah (ﷺ) used to perform Ghusl from a vessel which was the size of a Faraq [1] and he and I used to perform Ghusl using a single vessel."
[1] Sixteen Ratls.
أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّهَا قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَغْتَسِلُ فِي الْقَدَحِ وَهُوَ الْفَرَقُ وَكُنْتُ أَغْتَسِلُ أَنَا وَهُوَ فِي إِنَاءٍ وَاحِدٍ ‏.‏