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.
Sahih Muslim Book 39, Hadith 27
← Previous Hadith This hadith has been narrated on the authority of Ibn Shihab with the same chain of transmitters.

Sahih Muslim Book 39, Hadith 26 Next Hadith → Beware of getting, into the houses and meeting women (in seclusion). A person from the Ansar said: Allah's Messenger, what about husband's brother, whereupon he (ﷺ) said: Husband's brother is like death.

Sahih Muslim Book 39, Hadith 28