(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:
The Messenger of Allah (ﷺ) washed himself with water from a vessel (measuring seven to eight seers) because of sexual intercourse.
Reference: Sahih Muslim 319 a
In-book reference: Book 3, Hadith 48
USC-MSA web (English) reference(deprecated numbering scheme): Book 3, Hadith 624