It was narrated that Sahl bin Sa'd As-Sa'idi said:
"Uwaimir came to 'Asim bin 'Adi and said: 'Ask the Messenger of Ailah ﷺ for me: "Do you think that if a man finds another man with his wife and kills him, he should be killed in retaliation, or what should he do?" 'Asim asked the Messenger of Allah ﷺ about that, and the Messenger of Allah ﷺ disapproved of the question. Then 'Uwaimir met him ('Asim) and asked him about that, saying: 'What did you do?’ He said: I did that and you have not brought me any good. I asked the Messenger of Allah ﷺ and he disapproved of this question.’ Uwaimir said: 'By Allah, I will go to the Messenger of Allah ﷺ myself and ask him.' So he went to the Messenger of Allah ﷺ and found that Qur'an had been revealed concerning them, and the Prophet ﷺ told them to go through the procedure of Li'an. 'Uwaimir said: 'O Messenger of Allah, ﷺ by Allah if I take her back, I would have been telling lies about her.' So he left her before the Messenger of Allah ﷺ told him to do so, and that became the Sunnah for two who engage in the procedure of Li'an. Then the Prophet ﷺ said: 'Wait and see. If she gives birth to a child who is black in color with widely-spaced dark eyes and large buttocks, then I think that he was telling the truth about her, but if she gives birth to a child with a red complexion like a Wahrah,[1] then I think that he was lying.' Then she gave birth to a child with features resembling those of the man concerning whom she was accused."

حَدَّثَنَا أَبُو مَرْوَانَ، مُحَمَّدُ بْنُ عُثْمَانَ الْعُثْمَانِيُّ حَدَّثَنَا إِبْرَاهِيمُ بْنُ سَعْدٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَهْلِ بْنِ سَعْدٍ السَّاعِدِيِّ، قَالَ جَاءَ عُوَيْمِرٌ إِلَى عَاصِمِ بْنِ عَدِيٍّ فَقَالَ سَلْ لِي رَسُولَ اللَّهِ ﷺ أَرَأَيْتَ رَجُلاً وَجَدَ مَعَ امْرَأَتِهِ رَجُلاً فَقَتَلَهُ أَيُقْتَلُ بِهِ أَمْ كَيْفَ يَصْنَعُ فَسَأَلَ عَاصِمٌ رَسُولَ اللَّهِ ﷺ عَنْ ذَلِكَ فَعَابَ رَسُولُ اللَّهِ ﷺ الْمَسَائِلَ . ثُمَّ لَقِيَهُ عُوَيْمِرٌ فَسَأَلَهُ فَقَالَ مَا صَنَعْتَ فَقَالَ صَنَعْتُ أَنَّكَ لَمْ تَأْتِنِي بِخَيْرٍ سَأَلْتُ رَسُولَ اللَّهِ ﷺ فَعَابَ الْمَسَائِلَ فَقَالَ عُوَيْمِرٌ وَاللَّهِ لآتِيَنَّ رَسُولَ اللَّهِ ﷺ وَلأَسْأَلَنَّهُ . فَأَتَى رَسُولَ اللَّهِ ﷺ فَوَجَدَهُ قَدْ أُنْزِلَ عَلَيْهِ فِيهِمَا فَلاَعَنَ بَيْنَهُمَا فَقَالَ عُوَيْمِرٌ وَاللَّهِ لَئِنِ انْطَلَقْتُ بِهَا يَا رَسُولَ اللَّهِ لَقَدْ كَذَبْتُ عَلَيْهَا . قَالَ فَفَارَقَهَا قَبْلَ أَنْ يَأْمُرَهُ رَسُولُ اللَّهِ ﷺ فَصَارَتْ سُنَّةً فِي الْمُتَلاَعِنَيْنِ ثُمَّ قَالَ النَّبِيُّ ﷺ " انْظُرُوهَا فَإِنْ جَاءَتْ بِهِ أَسْحَمَ أَدْعَجَ الْعَيْنَيْنِ عَظِيمَ الأَلْيَتَيْنِ فَلاَ أُرَاهُ إِلاَّ قَدْ صَدَقَ عَلَيْهَا وَإِنْ جَاءَتْ بِهِ أُحَيْمِرَ كَأَنَّهُ وَحَرَةٌ فَلاَ أُرَاهُ إِلاَّ كَاذِبًا " . قَالَ فَجَاءَتْ بِهِ عَلَى النَّعْتِ الْمَكْرُوهِ .