Sahih Muslim 731
صحيح مسلم#731Sahihحَدَّثَنَا 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
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 3:53