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

ذِكْرُ مَا يُسْتَحَبُّ لِلْإِمَامِ أَنْ يُحَالِفَ بَيْنَ أَصْحَابِهِ لِيَكُونَ أَجْمَعُ لَهُمْ فِي أَسْبَابِهِمْ

ibnhibban:4520 – ʿAbdullāh b. Muḥammad al-Azdī > Isḥāq b. Ibrāhīm > Jarīr b. ʿAbd al-Ḥamīd > ʿĀṣim al-Aḥwal > Anas b. Mālik

Anas reported Messenger of Allah ﷺ established fraternity between the Quraish and the Ansar in his house at Medina. (Using translation from Muslim 2529b)   

ابن حبّان:٤٥٢٠ – أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ الْأَزْدِيُّ قَالَ حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ قَالَ أَخْبَرَنَا جَرِيرُ بْنُ عَبْدِ الْحَمِيدِ عَنْ عَاصِمٍ الْأَحْوَلِ عَنْ أَنَسِ بْنِ مَالِكٍ

عَنْ رَسُولِ اللَّهِ ﷺ «أَنَّهُ حَالَفَ بَيْنَ قُرَيْشٍ وَالْأَنْصَارِ فِي دُورِهِمْ بِالْمَدِينَةِ»  

See similar narrations below:

Collected by Muslim
muslim:2529b – Abū Bakr b. Abū Shaybah And Muḥammad b. ʿAbdullāh b. Numayr > ʿAbdah b. Sulaymān > ʿĀṣim > Anas

Anas reported Messenger of Allah ﷺ established fraternity between the Quraish and the Ansar in his house at Medina.  

مسلم:٢٥٢٩b – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ وَمُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ قَالاَ حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ عَنْ عَاصِمٍ عَنْ أَنَسٍ قَالَ

حَالَفَ رَسُولُ اللَّهِ ﷺ بَيْنَ قُرَيْشٍ وَالأَنْصَارِ فِي دَارِهِ الَّتِي بِالْمَدِينَةِ