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.
bayhaqi:16746h > Abū al-ʿAbbās > al-Rabīʿ > al-Shāfiʿī And ʾAẓunnuh > Ibrāhīm b. Muḥammad > Jaʿfar b. Muḥammad from his father from his grandfather ʿAlī b. al-Ḥusayn

[Machine] I have never seen anyone more honorable in leading a charge than your father, except on the day of the camel. And then a caller called out saying, "No one who retreats shall be killed or a wounded person harmed." Al-Shafi'i, may Allah have mercy on him, said, "I mentioned this hadith to Al-Darawardi, and he said, 'I don't recall it, I am amazed at its preservation.' Jafar, with this chain of narration, said, 'Al-Darawardi informed us that Jafar narrated from his father that Ali, may Allah be pleased with him, would not take any plunder, and that he would personally engage in battle and would not harm any wounded person or kill anyone fleeing.'"  

البيهقي:١٦٧٤٦فِيمَا أَجَازَ لِي أَبُو عَبْدِِ اللهِ الْحَافِظُ رِوَايَتَهُ عَنْهُ ثَنَا أَبُو الْعَبَّاسِ ثَنَا الرَّبِيعُ أَنْبَأَ الشَّافِعِيُّ وَأَظُنُّهُ عَنْ إِبْرَاهِيمَ بْنِ مُحَمَّدٍ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ أَبِيهِ عَنْ جَدِّهِ عَلِيِّ بْنِ الْحُسَيْنِ قَالَ دَخَلْتُ عَلَى مَرْوَانَ بْنِ الْحَكَمِ فَقَالَ

مَا رَأَيْتُ أَحَدًا أَكْرَمَ غَلَبَةً مِنْ أَبِيكَ مَا هُوَ إِلَّا أَنْ وَلَّيْنَا يَوْمَ الْجَمَلِ فَنَادَى مُنَادِيهِ لَا يُقْتَلُ مُدْبِرٌ وَلَا يُذْفَّفُ عَلَى جَرِيحٍ قَالَ الشَّافِعِيُّ رَحِمَهُ اللهُ ذَكَرْتُ هَذَا الْحَدِيثَ لِلدَّرَاوَرْدِيِّ فَقَالَ مَا أَحْفَظُهُ تَعْجَبُ لِحِفْظِهِ هَكَذَا ذَكَرَهُ جَعْفَرٌ بِهَذَا الْإِسْنَادِ قَالَ الدَّرَاوَرْدِيُّ أَخْبَرَنَا جَعْفَرٌ عَنْ أَبِيهِ أَنَّ عَلِيًّا ؓ كَانَ لَا يَأْخُذُ سَلْبًا وَأَنَّهُ كَانَ يُبَاشِرُ الْقِتَالَ بِنَفْسِهِ وَأَنَّهُ كَانَ لَا يُذَفِّفُ عَلَى جَرِيحٍ وَلَا يَقْتُلُ مُدْبِرًا