Sahih Muslim 2307 a
Anas b. Malik reported that Allah's Messenger (ﷺ) was the sublimest among people (in character) and the most generous amongst them and he was the bravest of men. One night the people of Medina felt disturbed and set forth in the direction of a sound when Allah's Messenger (ﷺ) met them on his way back as he had gone towards that sound ahead of them. He was on the horse of Abu Talha which had no saddle over it, and a sword was slung round his neck, and he was saying:
There was nothing to be afraid of, and he also said: We found it (this horse) like a torrent of water (indicating its swift-footedness), whereas the horse had been slow before that time.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى التَّمِيمِيُّ، وَسَعِيدُ بْنُ مَنْصُورٍ، وَأَبُو الرَّبِيعِ الْعَتَكِيُّ، وَأَبُو كَامِلٍ
 - وَاللَّفْظُ لِيَحْيَى - قَالَ يَحْيَى أَخْبَرَنَا وَقَالَ الآخَرَانِ، حَدَّثَنَا - حَمَّادُ بْنُ زَيْدٍ، عَنْ ثَابِتٍ،
 عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَحْسَنَ النَّاسِ وَكَانَ أَجْوَدَ
 النَّاسِ وَكَانَ أَشْجَعَ النَّاسِ وَلَقَدْ فَزِعَ أَهْلُ الْمَدِينَةِ ذَاتَ لَيْلَةٍ فَانْطَلَقَ نَاسٌ قِبَلَ الصَّوْتِ
 فَتَلَقَّاهُمْ رَسُولُ اللَّهِ صلى الله عليه وسلم رَاجِعًا وَقَدْ سَبَقَهُمْ إِلَى الصَّوْتِ وَهُوَ عَلَى فَرَسٍ
 لأَبِي طَلْحَةَ عُرْىٍ فِي عُنُقِهِ السَّيْفُ وَهُوَ يَقُولُ ‏"‏ لَمْ تُرَاعُوا لَمْ تُرَاعُوا ‏"‏ ‏.‏ قَالَ ‏"‏ وَجَدْنَاهُ
 بَحْرًا أَوْ إِنَّهُ لَبَحْرٌ ‏"‏ ‏.‏ قَالَ وَكَانَ فَرَسًا يُبَطَّأُ ‏.‏