حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ سَهْلَ بْنَ سَعْدٍ السَّاعِدِيَّ، أَخْبَرَهُ أَنَّ عُوَيْمِرًا الْعَجْلاَنِيَّ جَاءَ إِلَى عَاصِمِ بْنِ عَدِيٍّ الأَنْصَارِيِّ فَقَالَ لَهُ يَا عَاصِمُ أَرَأَيْتَ رَجُلاً وَجَدَ مَعَ امْرَأَتِهِ رَجُلاً أَيَقْتُلُهُ فَتَقْتُلُونَهُ أَمْ كَيْفَ يَفْعَلُ سَلْ لِي يَا عَاصِمُ عَنْ ذَلِكَ رَسُولَ اللَّهِ صلى الله عليه وسلم ‏.‏ فَسَأَلَ عَاصِمٌ رَسُولَ اللَّهِ صلى الله عليه وسلم عَنْ ذَلِكَ فَكَرِهَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمَسَائِلَ وَعَابَهَا حَتَّى كَبُرَ عَلَى عَاصِمٍ مَا سَمِعَ مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم فَلَمَّا رَجَعَ عَاصِمٌ إِلَى أَهْلِهِ جَاءَهُ عُوَيْمِرٌ فَقَالَ يَا عَاصِمُ مَاذَا قَالَ لَكَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَقَالَ عَاصِمٌ لِعُوَيْمِرٍ لَمْ تَأْتِنِي بِخَيْرٍ قَدْ كَرِهَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمَسْأَلَةَ الَّتِي سَأَلْتُهُ عَنْهَا ‏.‏ فَقَالَ عُوَيْمِرٌ وَاللَّهِ لاَ أَنْتَهِي حَتَّى أَسْأَلَهُ عَنْهَا ‏.‏ فَأَقْبَلَ عُوَيْمِرٌ حَتَّى أَتَى رَسُولَ اللَّهِ صلى الله عليه وسلم وَسْطَ النَّاسِ فَقَالَ يَا رَسُولَ اللَّهِ أَرَأَيْتَ رَجُلاً وَجَدَ مَعَ امْرَأَتِهِ رَجُلاً أَيَقْتُلُهُ فَتَقْتُلُونَهُ أَمْ كَيْفَ يَفْعَلُ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ قَدْ أُنْزِلَ فِيكَ وَفِي صَاحِبَتِكَ فَاذْهَبْ فَأْتِ بِهَا ‏"‏ ‏.‏ قَالَ سَهْلٌ فَتَلاَعَنَا وَأَنَا مَعَ النَّاسِ عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَلَمَّا فَرَغَا مِنْ تَلاَعُنِهِمَا قَالَ عُوَيْمِرٌ كَذَبْتُ عَلَيْهَا يَا رَسُولَ اللَّهِ إِنْ أَمْسَكْتُهَا ‏.‏ فَطَلَّقَهَا ثَلاَثًا قَبْلَ أَنْ يَأْمُرَهُ رَسُولُ اللَّهِ ‏.‏ وَقَالَ مَالِكٌ قَالَ ابْنُ شِهَابٍ فَكَانَتْ تِلْكَ بَعْدُ سُنَّةَ الْمُتَلاَعِنَيْنِ ‏.‏

Yahya related to me from Malik from Ibn Shihab that Sahl ibn Sadas-Saidi told him that Uwaymir al-Ajlani came to Asim ibn Adi al-Ansari and said to him, "Asim! What do you think a man who findsanother man with his wife should do? Should he kill him and then bekilled himself, or what should .he do? Asim! ask the Messenger ofAllah, may Allah bless him and grant him peace, about that for me."Asim asked the Messenger of Allah, may Allah bless him and grant himpeace, about it. The Messenger of Allah, may Allah bless him and granthim peace, was revolted by the questions and reproved them until whathe heard from the Messenger of Allah, may Allah bless him and granthim peace. was intolerable for Asim. When Asim returned to his people,Uwaymir came to him and said, " Asim! what did the Messenger of Allah,may Allah bless him and grant him peace, say to you?" Asim said toUwaymir, "You didn't bring me any good. The Messenger of Allah, mayAllah bless him and grant him peace, was revolted by the questionwhich I asked him." Uwaymir said, "By Allah! I will not stop until Iask him about it!" Uwaymir stood up and went to the Messenger ofAllah, may Allah bless him and grant him peace, in the middle of thepeople and said, "Messenger of Allah! What do you think a man whofinds another man with his wife should do? Should he kill him and thenbe killed himself, or what should he do?" The Messenger of Allah, mayAllah bless him and grant him peace, said, "Something has been sentdown about you and your wife, so go and bring her." Sahlcontinued, "They mutually cursed one another in the presence of theMessenger, may Allah bless him and grant him peace, and I was presentwith the people. When they finished cursing each other, Uwaymir said,'I shall have lied about her, Messenger of Allah, if I keep her,' andpronounced the divorce three times before the Messenger of Allah, mayAllah bless him and grant him peace, ordered him to do it." Malik said that Ibn Shihab said, "That was how the sunna of a couplemutually cursing each other was established (lian)." Translation Not Available

Book Ref: Muwatta Imam Malik Book 29 Hadith 1191
Web Ref:  Muwatta Imam Malik Book 29 Hadith 34