It wasnarrated that Qais bin 'Aidh, who was Abu Kahil, said:
"I sawtheProphet (ﷺ) delivering the sermon atop a beautiful she-camel,andan Ethiopian was holding onto its reins." (RU)
English reference (RU): Vol. 1, Book 5, Hadith 1285 (RU)
Arabic reference (RU): Book 5, Hadith 1344 (RU)