Sahih al-Bukhari, Volume 4, Book 52, Hadith 118 (USC-MSA) ⓘ
Narrated Anas: The Prophet met them (i.e. the people) while he was riding an unsaddled horse with his sword slung over his shoulder.
حَدَّثَنَا عَمْرُو بْنُ عَوْنٍ، حَدَّثَنَا حَمَّادٌ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ ـ رضى الله عنه اسْتَقْبَلَهُمُ النَّبِيُّ صلى الله عليه وسلم عَلَى فَرَسٍ عُرْىٍ، مَا عَلَيْهِ سَرْجٌ، فِي عُنُقِهِ سَيْفٌ.
also referenced under: Book 56, Hadith 82 (In-Book) & Hadith 2866 (DarusSalam)