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
quran:49:10 –

The believers are but brothers, so make settlement between your brothers. And fear Allah that you may receive mercy.  

The believers are indeed brothers, in religion. Therefore ˹always˺ make peace between your brethren, when they fall into dispute with one another (a variant reading ˹for the dual form akhawaykum, ‘your two brethren’˺ has ikhwatakum, ‘your brothers’) and fear God, so that perhaps you might receive mercy.
القرآن:٤٩:١٠ –

إِنَّمَا الْمُؤْمِنُونَ إِخْوَةٌ فَأَصْلِحُوا بَيْنَ أَخَوَيْكُمْ ۚ وَاتَّقُوا اللَّهَ لَعَلَّكُمْ تُرْحَمُونَ  

{إنما المؤمنون إخوة} في الدين {فأصلحوا بين أخويكم} إذا تنازعا، وقرئ إخوتكم بالفوقانية {واتقوا الله لعلكم ترحمون}.