Sahih Muslim 698
صحيح مسلم#698SahihIbn 'Abbas reported:The Apostle (ﷺ) woke up at night; relieved himself, and then washed his face and hands and then again slept
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: 3:20