Sahih Muslim 1775 a
It has been narrated on the authority of 'Abbas who said:
I was in the company of the Messenger of Allah (ﷺ) on the Day of Hunain. I and Abd Sufyan b. Harith b. 'Abd al-Muttalib stuck to the Messenaer of Allah (ﷺ) and we did not separate from him. And the Messenger of Allah (may place be upon him) was riding on his white mule which had been presented to him by Farwa b. Nufitha al-Judhami. When the Muslims had an encounter with the disbelievers, the Muslims fled, falling back, but the Messenger of Allah (ﷺ) began to spur his mule towards the disbelievers. I was holding the bridle of the mule of the Messenger of Allah (ﷺ) checking it from going very fast, and Abu Sufyan was holding the stirrup of the (mule of the) Messenger of Allah (ﷺ), who said: Abbas, call out to the people of al-Samura. Abbas (who was a man with a loud voice) called out at the top of the voice: Where are the people of Samura? (Abbas said: ) And by God, when they heard my voice, they came back (to us) as cows come back to their calves, and said: We are present, we are present! 'Abbas said: They began to fight the infidels. Then there was a call to The Ansar. Those (who called out to them) shouted: O ye party of the Ansar! O party of the Ansar! Banu al-Harith b. al-Khazraj were the last to be called. Those (who called out to them) shouted: O Banu Al-Harith b. al-Khazraj! O BanU Harith b. al-Khazraj! And the Messenger of Allah (ﷺ) who was riding on his mule looked at their fight with his neck stretched forward and he said: This is the time when the fight is raging hot. Then the Messenger of Allah (ﷺ) took (some) pebbles and threw them in the face of the infidels. Then he said: By the Lord of Muhammad, the infidels are defeated. 'Abbas said: I went round and saw that the battle was in the same condition in which I had seen it. By Allah, it remained in the same condition until he threw the pebbles. I continued to watch until I found that their force had been spent out and they began to retreat.
وَحَدَّثَنِي أَبُو الطَّاهِرِ، أَحْمَدُ بْنُ عَمْرِو بْنِ سَرْحٍ أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، قَالَ حَدَّثَنِي كَثِيرُ بْنُ عَبَّاسِ بْنِ عَبْدِ الْمُطَّلِبِ، قَالَ قَالَ عَبَّاسٌ شَهِدْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم يَوْمَ حُنَيْنٍ فَلَزِمْتُ أَنَا وَأَبُو سُفْيَانَ بْنُ الْحَارِثِ بْنِ عَبْدِ الْمُطَّلِبِ رَسُولَ اللَّهِ صلى الله عليه وسلم فَلَمْ نُفَارِقْهُ وَرَسُولُ اللَّهِ صلى الله عليه وسلم عَلَى بَغْلَةٍ لَهُ بَيْضَاءَ أَهْدَاهَا لَهُ فَرْوَةُ بْنُ نُفَاثَةَ الْجُذَامِيُّ فَلَمَّا الْتَقَى الْمُسْلِمُونَ وَالْكُفَّارُ وَلَّى الْمُسْلِمُونَ مُدْبِرِينَ فَطَفِقَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَرْكُضُ بَغْلَتَهُ قِبَلَ الْكُفَّارِ قَالَ عَبَّاسٌ وَ أَنَا آخِذٌ بِلِجَامِ بَغْلَةِ رَسُولِ اللَّهِ صلى الله عليه وسلم أَكُفُّهَا إِرَادَةَ أَنْ لاَ تُسْرِعَ وَأَبُو سُفْيَانَ آخِذٌ بِرِكَابِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَىْ عَبَّاسُ نَادِ أَصْحَابَ السَّمُرَةِ ‏"‏ ‏.‏ فَقَالَ عَبَّاسٌ وَكَانَ رَجُلاً صَيِّتًا فَقُلْتُ بِأَعْلَى صَوْتِي أَيْنَ أَصْحَابُ السَّمُرَةِ قَالَ فَوَاللَّهِ لَكَأَنَّ عَطْفَتَهُمْ حِينَ سَمِعُوا صَوْتِي عَطْفَةُ الْبَقَرِ عَلَى أَوْلاَدِهَا ‏.‏ فَقَالُوا يَا لَبَّيْكَ يَا لَبَّيْكَ - قَالَ - فَاقْتَتَلُوا وَالْكُفَّارَ وَالدَّعْوَةُ فِي الأَنْصَارِ يَقُولُونَ يَا مَعْشَرَ الأَنْصَارِ يَا مَعْشَرَ الأَنْصَارِ قَالَ ثُمَّ قُصِرَتِ الدَّعْوَةُ عَلَى بَنِي الْحَارِثِ بْنِ الْخَزْرَجِ فَقَالُوا يَا بَنِي الْحَارِثِ بْنِ الْخَزْرَجِ يَا بَنِي الْحَارِثِ بْنِ الْخَزْرَجِ ‏.‏ فَنَظَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَهُوَ عَلَى بَغْلَتِهِ كَالْمُتَطَاوِلِ عَلَيْهَا إِلَى قِتَالِهِمْ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ هَذَا حِينَ حَمِيَ الْوَطِيسُ ‏"‏ ‏.‏ قَالَ ثُمَّ أَخَذَ رَسُولُ اللَّهِ صلى الله عليه وسلم حَصَيَاتٍ فَرَمَى بِهِنَّ وُجُوهَ الْكُفَّارِ ثُمَّ قَالَ ‏"‏ انْهَزَمُوا وَرَبِّ مُحَمَّدٍ ‏"‏ ‏.‏ قَالَ فَذَهَبْتُ أَنْظُرُ فَإِذَا الْقِتَالُ عَلَى هَيْئَتِهِ فِيمَا أَرَى - قَالَ - فَوَاللَّهِ مَا هُوَ إِلاَّ أَنْ رَمَاهُمْ بِحَصَيَاتِهِ فَمَا زِلْتُ أَرَى حَدَّهُمْ كَلِيلاً وَأَمْرَهُمْ مُدْبِرًا ‏.‏