The Book of Water
كتاب المياه
Chapter 13: The Concession Regarding The Leftovers Of One Who Is Junub
It was narrated from 'Aishah that she used to perform Ghusl with the Messenger of Allah (ﷺ) from a single vessel.
Chapter 14: How Much Water Is Sufficient For A Person To Use For Wudu' And Ghusl
It was narrated that 'Abdullah bin Jabr said
"I heard Anas bin Malik say: 'The Messenger of Allah (ﷺ) used to perform Wudu' with a Makkuk (cup) and Ghusl with five Makkuks (cups).'"
It was narrated from 'Aishah that the Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with approximately a Sa'.
It was narrated that 'Aishah said
"The Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with a Sa'."