Once the people of Medina were frightened, so the Prophet ﷺ borrowed a horse from Abu Talha called Al-Mandub, and rode it. When he came back he said, "We have not seen anything (to be afraid of), but the horse was very fast (having an energy as inexhaustible as the water of the sea).  

سَمِعْتُ أَنَسًا يَقُولُ كَانَ فَزَعٌ بِالْمَدِينَةِ فَاسْتَعَارَ النَّبِيُّ ﷺ فَرَسًا مِنْ أَبِي طَلْحَةَ يُقَالُ لَهُ الْمَنْدُوبُ فَرَكِبَ فَلَمَّا رَجَعَ قَالَ مَا رَأَيْنَا مِنْ شَىْءٍ وَإِنْ وَجَدْنَاهُ لَبَحْرًا