(113) باب فِي الرَّجُلِ يَتَرَجَّلُ عِنْدَ اللِّقَاءِ
Al Bara' said "When the Prophet (ﷺ) fought the polytheists in the battle of Hunain, they (the Muslims) retreated, he (the Prophet) came down from his mule and walked on foot.
Reference: Sunan Abi Dawud 2658
In-book reference: Book 15, Hadith 182
English translation: Book 14, Hadith 2652