Jami` at-Tirmidhi 1685
جامع الترمذي#1685Sahihحَدَّثَنَا مَحْمُودُ بْنُ غَيْلاَنَ، حَدَّثَنَا أَبُو دَاوُدَ الطَّيَالِسِيُّ، قَالَ أَنْبَأَنَا شُعْبَةُ، عَنْ قَتَادَةَ، حَدَّثَنَا أَنَسُ بْنُ مَالِكٍ، قَالَ رَكِبَ النَّبِيُّ صلى الله عليه وسلم فَرَسًا لأَبِي طَلْحَةَ يُقَالُ لَهُ مَنْدُوبٌ فَقَالَ " مَا كَانَ مِنْ فَزَعٍ وَإِنْ وَجَدْنَاهُ لَبَحْرًا " . قَالَ أَبُو عِيسَى وَفِي الْبَابِ عَنِ ابْنِ عَمْرِو بْنِ الْعَاصِ . وَهَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
Narrated Anas bin Malik: "The Prophet (ﷺ) rode a horse belonging to Abu Talhah called Mandub. He said: 'There is nothing to be frightened of, and we found him to be (quick) like the sea.'" [Abu 'Eisa said:] There is something on this topic from Ibn 'Amr Al-'As
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 23:16