Sunan Ibn Majah, Hadith 1285 ⓘ
It was narrated that Qais bin ‘Aidh, who was Abu Kahil, said: “I saw the Prophet delivering the sermon atop a beautiful she-camel, and an Ethiopian was holding onto its reins.”
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ أَبِي خَالِدٍ، عَنْ قَيْسِ بْنِ عَائِذٍ، - هُوَ أَبُو كَاهِلٍ - قَالَ رَأَيْتُ النَّبِيَّ ـ صلى الله عليه وسلم ـ يَخْطُبُ عَلَى نَاقَةٍ حَسْنَاءَ وَحَبَشِيٌّ آخِذٌ بِخِطَامِهَا .
also referenced under: Book 5, Hadith 1344 (In-Book) & Volume 2, Book 5, Hadith 1285 (DarusSalam)