صَحِيحُ مُسْلِمٍ
Sahih Muslim 321 c
The Book of Menstruation
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
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ، قَالَ حَدَّثَنَا أَفْلَحُ بْنُ حُمَيْدٍ، عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ، عَنْ عَائِشَةَ، قَالَتْ كُنْتُ أَغْتَسِلُ أَنَا وَرَسُولُ اللَّهِ، صلى الله عليه وسلم مِنْ إِنَاءٍ وَاحِدٍ تَخْتَلِفُ أَيْدِينَا فِيهِ مِنَ الْجَنَابَةِ .
'A'isha reported: I and the Messenger (ﷺ) took a bath from the same vessel and our hands alternated into it in the state that we had had sexual intercourse.
Sahih Muslim, 321 cSahihصحيح