He had performed Hajj with the Prophet ﷺ. He said, "I saw him delivering the sermon on the Day of Arafah while mounted on his camel."
حدثنا وكيع حدثنا
وكان قد حج مع النبي ﷺ قال رأيته يخطب يوم عرفة على بعيره
Its chain of transmission is sahih. Salama bin Nubayt, Abu Firas al-Kufi, is trustworthy. This hadith relates to the sermon of the Farewell Pilgrimage. See what follows it.