Sahih Muslim 720
صحيح مسلم#720SahihHisham narrated it from his father, who narrated it on the authority of 'A'isha that when the Apostle (ﷺ) took a bath because of sexual inter-course, he first washed the palms of his hands three times, and then the whole hadith was transmitted like that based on the authority of Abu Mu'awyia, but no mention is made of the washing of feet
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 3:42