Sahih Muslim 5673
صحيح مسلم#5673SahihJabir reported Allah's Messenger (ﷺ) as saying:Behold, no person should spend the night with a married woman, but only in case he is married to her or he is her Mahram
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: 39:27