(10) باب الْقَدْرِ الْمُسْتَحَبِّ مِنَ الْمَاءِ فِي غُسْلِ الْجَنَابَةِ وَغُسْلِ الرَّجُلِ وَالْمَرْأَةِ فِي إِنَاءٍ وَاحِدٍ فِي حَالَةٍ وَاحِدَةٍ وَغُسْلِ أَحَدِهِمَا بِفَضْلِ الآخَرِ
'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.
Reference: Sahih Muslim 321 c
In-book reference: Book 3, Hadith 53
USC-MSA web (English) reference(deprecated numbering scheme): Book 3, Hadith 629