Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai:3474 – ʿAmr b. ʿAlī And Muḥammad b. al-Muthanná > Muʿādh b. Hishām from my father > Qatādah > ʿAzrah > Saʿīd b. Jubayr > Lam Yufarriq al-Muṣʿab Bayn al-Mutalāʿinayn > Saʿīd Fadhakart Dhalik Ibn ʿUmar

"Al-Mus'ab did not separate the two who engaged in Li'an." Sa'eed said: "I mentioned that to Ibn 'Umar and he said: 'The Messenger of Allah separated the couple from Banu 'Ajlan.'"  

النسائي:٣٤٧٤ – أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ وَمُحَمَّدُ بْنُ الْمُثَنَّى وَاللَّفْظُ لَهُ قَالاَ حَدَّثَنَا مُعَاذُ بْنُ هِشَامٍ حَدَّثَنِي أَبِي عَنْ قَتَادَةَ عَنْ عَزْرَةَ عَنْ سَعِيدِ بْنِ جُبَيْرٍ قَالَ

لَمْ يُفَرِّقِ الْمُصْعَبُ بَيْنَ الْمُتَلاَعِنَيْنِ قَالَ سَعِيدٌ فَذَكَرْتُ ذَلِكَ لاِبْنِ عُمَرَ فَقَالَ فَرَّقَ رَسُولُ اللَّهِ ﷺ بَيْنَ أَخَوَىْ بَنِي الْعَجْلاَنِ  

See similar narrations below:

Collected by Muslim
muslim:1493f – Abū Ghassān al-Mismaʿī And Muḥammad b. al-Muthanná And Ibn Bashhār Wa-al-Lafẓ Lilmismaʿī And Ibn al-Muthanná > Muʿādh Wahū Ibn Hishām from my father > Qatādah > ʿAzrah > Saʿīd b. Jubayr > Lam Yufarriq al-Muṣʿab Bayn al-Mutalāʿinayn > Saʿīd Fadhukir Dhalik Liʿabd Allāh b. ʿUmar

It was mentioned to 'Abdullah b. Umar (Allah be pleased with them) and he said: Allah's Apostle ﷺ effected separation between the two members of Banu al-'Ajlan.  

مسلم:١٤٩٣f – وَحَدَّثَنَا أَبُو غَسَّانَ الْمِسْمَعِيُّ وَمُحَمَّدُ بْنُ الْمُثَنَّى وَابْنُ بَشَّارٍ وَاللَّفْظُ لِلْمِسْمَعِيِّ وَابْنِ الْمُثَنَّى قَالُوا حَدَّثَنَا مُعَاذٌ وَهُوَ ابْنُ هِشَامٍ قَالَ حَدَّثَنِي أَبِي عَنْ قَتَادَةَ عَنْ عَزْرَةَ عَنْ سَعِيدِ بْنِ جُبَيْرٍ قَالَ

لَمْ يُفَرِّقِ الْمُصْعَبُ بَيْنَ الْمُتَلاَعِنَيْنِ قَالَ سَعِيدٌ فَذُكِرَ ذَلِكَ لِعَبْدِ اللَّهِ بْنِ عُمَرَ فَقَالَ فَرَّقَ نَبِيُّ اللَّهِ ﷺ بَيْنَ أَخَوَىْ بَنِي الْعَجْلاَنِ