Sahih al-Bukhari 2968

Arabic

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، حَدَّثَنِي قَتَادَةُ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ قَالَ كَانَ بِالْمَدِينَةِ فَزَعٌ، فَرَكِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَرَسًا لأَبِي طَلْحَةَ، فَقَالَ ‏ "‏ مَا رَأَيْنَا مِنْ شَىْءٍ، وَإِنْ وَجَدْنَاهُ لَبَحْرًا ‏"‏‏.‏

English translation

Narrated Anas bin Malik:Once there was a feeling of fright at Medina, so Allah's Messenger (ﷺ) rode a horse belonging to Abu Talha and (on his return) he said, "We have not seen anything (fearful), but we found this horse very fast

Reference: Sahih al-Bukhari 2968, Book of Fighting for the Cause of Allah (Jihaad). English translation by Dr. Muhammad Muhsin Khan.