The amount of water with which it is recommended to perform ghusl in the case of janabah; a man and woman washing from a single vessel; one of them washing with the left-over water of the other
Hafsa, daughter of 'Abd al-Rahman b. Abu Bakr, reported that 'A'isha narrated to her that she and the Messenger of Allah (ﷺ) took a bath from the same vessel which contained water equal to three Mudds or thereabout.