Sahih Muslim 1776 b
It has been narrated (through a different chain of transmitters) by Abu Ishiq that a person said to Bara' (b. 'Azib):
Abu Umara, did you flee on the Day of Hunain? He replied: The Messenger of Allah (ﷺ) did not retreat. (What actually happened was that some hasty young men who were either inadequately armed or were unarmed met a group of men from Banu Hawazin and Banu Nadir who happened to be (excellent) archers. The latter shot at them a volley of arrows that did not miss. The people turned to the Messenger of Allah (ﷺ). Abu Sufyan b. Harith was leading his mule. So he got down, prayed and invoked God's help. He said: I am the Prophet. This is no untruth. I am the son of Abd al-Muttalib. O God, descend Thy help. Bara' continued: When the battle grew fierce. we, by God. would seek protection by his side, and the bravest among us was he who confronted the onslaught and it was the Prophet (ﷺ).
حَدَّثَنَا أَحْمَدُ بْنُ جَنَابٍ الْمِصِّيصِيُّ، حَدَّثَنَا عِيسَى بْنُ يُونُسَ، عَنْ زَكَرِيَّاءَ، عَنْ أَبِي، إِسْحَاقَ قَالَ جَاءَ رَجُلٌ إِلَى الْبَرَاءِ فَقَالَ أَكُنْتُمْ وَلَّيْتُمْ يَوْمَ حُنَيْنٍ يَا أَبَا عُمَارَةَ فَقَالَ أَشْهَدُ عَلَى نَبِيِّ اللَّهِ صلى الله عليه وسلم مَا وَلَّى وَلَكِنَّهُ انْطَلَقَ أَخِفَّاءُ مِنَ النَّاسِ وَحُسَّرٌ إِلَى هَذَا الْحَىِّ مِنْ هَوَازِنَ وَهُمْ قَوْمٌ رُمَاةٌ فَرَمَوْهُمْ بِرِشْقٍ مِنْ نَبْلٍ كَأَنَّهَا رِجْلٌ مِنْ جَرَادٍ فَانْكَشَفُوا فَأَقْبَلَ الْقَوْمُ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم وَأَبُو سُفْيَانَ بْنُ الْحَارِثِ يَقُودُ بِهِ بَغْلَتَهُ فَنَزَلَ وَدَعَا وَاسْتَنْصَرَ وَهُوَ يَقُولُ ‏
"‏ أَنَا النَّبِيُّ لاَ كَذِبْ أَنَا ابْنُ عَبْدِ الْمُطَّلِبْ اللَّهُمَّ نَزِّلْ نَصْرَكَ ‏"‏ ‏.‏ قَالَ الْبَرَاءُ كُنَّا وَاللَّهِ إِذَا احْمَرَّ الْبَأْسُ نَتَّقِي بِهِ وَإِنَّ الشُّجَاعَ مِنَّا لَلَّذِي يُحَاذِي بِهِ ‏.‏ يَعْنِي النَّبِيَّ صلى الله عليه وسلم ‏.‏