Abbas bin Abdul-Muttalib reported,

Abbas reported, "I was present with the Messenger of Allah ﷺ on the day of Hunayn. Abu Sufyan bin Harith bin Abdul-Muttalib and I stayed close to the Messenger of Allah ﷺ and did not leave him. The Messenger of Allah ﷺ was riding his white mule that Farwa bin Nufatha al-Judhami had given him as a gift.When the Muslims and the disbelievers met in battle, the Muslims turned and fled. The Messenger of Allah ﷺ began urging his mule forward toward the disbelievers, while I was holding the bridle of his mule, restraining her so she would not go too fast, and Abu Sufyan was holding his stirrup.The Messenger of Allah ﷺ said, 'Abbas, call out to the Companions of the Samura tree.'"Abbas, who had a powerful voice, said, "I called out at the top of my voice, 'Where are the Companions of the Samura tree?' By Allah, the moment they heard my voice they turned back toward us like a cow turning back to her calves. They cried out, 'At your service. At your service.'They engaged the disbelievers in battle, and the call went out to the Ansar, 'People of the Ansar. People of the Ansar.' Then the call was narrowed to the Banu Harith bin Khazraj, 'Sons of Harith bin Khazraj. Sons of Harith bin Khazraj.'The Messenger of Allah ﷺ, on his mule, stretched himself up like one looking out from above to watch their fighting, then he said, 'This is when the furnace has grown hot.'Then the Messenger of Allah ﷺ took some pebbles and threw them in the faces of the disbelievers, saying, 'They are defeated, by the Lord of Muhammad.'I went to look, and the fighting appeared to me to be just as it had been. By Allah, no sooner had he thrown those pebbles at them than I continued to see their force weakening and their cause turning to retreat."

عن عباس بن عبد المطلب قال

شهدت مع رسول الله ﷺ يوم حنين، فلزمت أنا وأبو سفيان بن الحارث بن عبد المطلب رسول الله ﷺ، فلم نفارقه، ورسول الله ﷺ على بغلة له بيضاء، أهداها له فروة بن نفاثة الجذامي، فلما التقى المسلمون والكفار ولى المسلمون مدبرين فطفق رسول الله ﷺ يركض بغلته قبل الكفار، قال عباس: وأنا آخذ بلجام بغلة رسول الله ﷺ أكفها إرادة أن لا تسرع، وأبو سفيان آخذ بركاب رسول الله ﷺ، فقال رسول الله ﷺ: أى عباس! ناد أصحاب السمرة فقال عباس- وكان رجلا صيتا، فقلت بأعلى صوتي: أين أصحاب السمرة؟ قال: فوالله لكأن عطفتهم حين سمعوا صوتي، عطفة البقر على أولادها. فقالوا: يا لبيك! يا لبيك! قال: فاقتتلوا والكفار، والدعوة في الأنصار، يقولون: يا معشر الأنصار! يا معشر الأنصار! قال: ثم قصرت الدعوة على بني الحارث بن الخزرج فقالوا: يا بني الحارث بن الخزرج! يا بني الحارث بن الخزرج! فنظر رسول الله ﷺ وهو على بغلته، كالمتطاول عليها إلى قتالهم، فقال رسول الله ﷺ: هذا حين حمى الوطيس قال: ثم أخذ رسول الله ﷺ حصيات، فرمي بهن وجوه الكفار، ثم قال: انهزموا ورب محمد. قال: فذهبت أنظر، فإذا القتال على هيئته فيما أرى، قال: فوالله ما هو إلا أن رماهم بحصياته، فما زلت أرى حدهم كليلا وأمرهم مدبرا.