Sahih Muslim 700
صحيح مسلم#700SahihA'isha reported:Whenever the Messenger of Allah (ﷺ) had sexual intercourse and intended to eat or sleep, he performed the ablution of prayer
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: 3:22