بُلُوغُ الْمَرَامِ
Bulugh al-Maram 1017
Marriage
وَعَنْ أَبِي سَعِيدٍ اَلْخُدْرِيِّ - رضى الله عنه - قَالَ : قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{ إِنَّ شَرَّ اَلنَّاسِ مَنْزِلَةً عِنْدَ اَللَّهِ يَوْمَ اَلْقِيَامَةِ ; اَلرَّجُلُ يُفْضِي إِلَى اِمْرَأَتِهِ وَتُفْضِي إِلَيْهِ , ثُمَّ يَنْشُرُ سِرَّهَا } أَخْرَجَهُ مُسْلِمٌ [1] .
Narrated Abu Sa'id al-Khudri (RA): Allah's Messenger (ﷺ) said: "The worst of people in position before Allah on the Day of Resurrection is the man who has intercourse with his wife, and she with him, and then spreads her secrets." [Reported by Muslim].
Sunnah.com reference: Book 8, Hadith 62