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
ahmad:6904 – Naṣr b. Bāb > Ḥajjāj > ʿAmr b. Shuʿayb from his father from his grandfather

[Machine] That the Messenger of Allah ﷺ wrote a document between the emigrants and the supporters, that they should fortify their fortresses and assist each other with righteousness and reconciliation among the Muslims.  

أحمد:٦٩٠٤ – حَدَّثَنَا نَصْرُ بْنُ بَابٍ عَنْ حَجَّاجٍ عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ

أَنَّ رَسُولَ اللهِ ﷺ كَتَبَ كِتَابًا بَيْنَ الْمُهَاجِرِينَ وَالْأَنْصَارِ عَلَى أَنْ يَعْقِلُوا مَعَاقِلَهُمْ وَيَفْدُوا عَانِيَهُمْ بِالْمَعْرُوفِوَالْإِصْلَاحِ بَيْنَ الْمُسْلِمِينَ  

See similar narrations below:

Collected by Aḥmad
ahmad:2443 – Surayj > ʿAbbād > Ḥajjāj > ʿAmr b. Shuʿayb from his father from his grandfather

[Machine] "The Prophet ﷺ wrote a book between the emigrants and the supporters, commanding them to strengthen their fortresses and to help their sick and needy with kindness and reconciliation among the Muslims."  

أحمد:٢٤٤٣ – حَدَّثَنَا سُرَيْجٌ حَدَّثَنَا عَبَّادٌ عَنْ حَجَّاجٍ عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ

أَنَّ النَّبِيَّ ﷺ كَتَبَ كِتَابًا بَيْنَ الْمُهَاجِرِينَ وَالْأَنْصَارِ أَنْ يَعْقِلُوا مَعَاقِلَهُمْ وَأَنْ يَفْدُوا عَانِيَهُمْ بِالْمَعْرُوفِ وَالْإِصْلاحِ بَيْنَ الْمُسْلِمِينَ