'Uwaimir Al-ʿAjlani came to ʿAsim bin ʿAdi and said, "If a man found another man with his wife and killed him, would you sentence the husband to death (in Qisas,) i.e., equality in punishment)? O ʿAsim! Please ask Messenger of Allah ﷺ about this matter on my behalf." ʿAsim asked the Prophet ﷺ but the Prophet disliked the question and disapproved of it. ʿAsim returned and informed 'Uwaimir that the Prophet disliked that type of question. 'Uwaimir said, "By Allah, I will go (personally) to the Prophet." 'Uwaimir came to the Prophet ﷺ when Allah had already revealed Qur'anic Verses (in that respect), after ʿAsim had left (the Prophet ﷺ ). So the Prophet ﷺ said to 'Uwaimir, "Allah has revealed Qur'anic Verses regarding you and your wife." The Prophet ﷺ then called for them, and they came and carried out the order of Lian. Then 'Uwaimir said, "O Messenger of Allah ﷺ! Now if I kept her with me, I would be accused of telling a lie." So 'Uwaimir divorced her although the Prophet ﷺ did not order him to do so. Later on this practice of divorcing became the tradition of couples involved in a case of Li'an. The Prophet ﷺ said (to the people). "Wait for her! If she delivers a red short (small) child like a Wahra (a short red animal). then I will be of the opinion that he ('Uwaimir) has told a lie but if she delivered a black big-eyed one with big buttocks, then I will be of the opinion that he has told the truth about her." 'Ultimately she gave birth to a child that proved the accusation. (See Hadith No. 269, Vol. 6) (Using translation from Bukhārī 7304)
أَرَأَيْتَ رَجُلًا وَجَدَ مَعَ امْرَأَتِهِ رَجُلًا فَيَقْتُلُهُ فَتَقْتُلُونَهُ بِهِ سَلْ يَا عَاصِمُ النَّبِيَّ ﷺ فَجَاءَ عَاصِمٌ فَسَأَلَ النَّبِيَّ ﷺ فَكَرِهَ الْمَسَائِلَ وَعَابَهَا فَرَجَعَ فَأَخْبَرَهُ أَنَّ النَّبِيَّ ﷺ كَرِهَ الْمَسَائِلَ وَعَابَهَا فَقَالَ عُوَيْمِرٌ فَوَاللهِ لَآتِيَنَّ رَسُولَ اللهِ ﷺ فَجَاءَ وَقَدْ أُنْزِلَ الْقُرْآنُ خَلْفَ عَاصِمٍ فَسَأَلَ النَّبِيَّ ﷺ فَقَالَ النَّبِيُّ ﷺ «قَدْ أُنْزِلَ فِيكُمْ قُرْآنٌ» فَدَعَاهُمَا فَتَقَدَّمَا فَتَلَاعَنَا ثُمَّ قَالَ كَذَبْتُ عَلَيْهَا يَا رَسُولَ اللهِ إِنْ أَمْسَكْتُهَا فَفَارَقَهَا وَمَا أَمَرَ النَّبِيُّ ﷺ بِفِرَاقِهَا فَجَرَتْ سُنَّةُ الْمُتلَاعِنَيْنِ فَقَالَ النَّبِيُّ ﷺ «انْظُرُوا فَإِنْ جَاءَتْ بِهِ أَحْمَرَ قَصِيرًا مِثْلَ الْوَحْرَةِ فَلَا أُرَاهُ إِلَّا قَدْ كَذَبَ عَلَيْهَا وَإِنْ جَاءَتْ بِهِ أَسْحَمَ أَعْيَنَ ذَا أَلْيَتَيْنِ فَلَا أَحْسَبُهُ إِلَّا قَدْ صَدَقَ عَلَيْهَا» فَجَاءَتْ بِهِ عَلَى الْأَمْرِ الْمَكْرُوهِ