Sahih al-Bukhari, Book 56, Hadith 73 (In-Book) ⓘ

Narrated Anas bin Malik: Once there was a feeling of fright in Medina, so the Prophet borrowed a horse belonging to us called Mandub (and he rode away on it). (When the Prophet returned) he said, "I have not seen anything of fright and I found it (i.e. this horse) very fast."

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا غُنْدَرٌ، حَدَّثَنَا شُعْبَةُ، سَمِعْتُ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ قَالَ كَانَ فَزَعٌ بِالْمَدِينَةِ، فَاسْتَعَارَ النَّبِيُّ صلى الله عليه وسلم فَرَسًا لَنَا يُقَالُ لَهُ مَنْدُوبٌ‏.‏ فَقَالَ ‏ "‏ مَا رَأَيْنَا مِنْ فَزَعٍ، وَإِنْ وَجَدْنَاهُ لَبَحْرًا ‏" ‏‏.‏