Nubayt bin Shareet, who had performed Hajj with the Prophet ﷺ, reported through his son from his father, "I saw the Prophet ﷺ delivering a sermon while mounted on his camel."
عن أبيه (يعني نبيط بن شريط) وكان قد حج مع النبي ﷺ قال: رأيت النبي ﷺ يخطب على بعيره.
Ibn Majah (1286) narrated it from Abu Bakr bin Abu Shayba, who said, "Waki narrated to us, from Salama bin Nubayt," with the same wording. Imam Ahmad (18721) also narrated it from Waki with the same chain, adding "on the Day of Arafah."This isnad is sahih. Salama bin Nubayt bin Shurayt al-Ashjai is trustworthy, Ahmad, Abu Dawud, and many scholars affirmed his reliability. Waki used to take pride in him and say, "Salama bin Nubayt narrated to us, and he was trustworthy."I say, Sufyan Thawri and Ibn Mubarak both followed Waki in this, narrating from Salama bin Nubayt with the same wording. Nasai (3007, 3008) narrated it through their route.However, Abu Dawud (1916) narrated it through the route of Abdullah bin Dawud, from Salama bin Nubayt, from a man of the tribe, from his father Nubayt, that he saw the Prophet ﷺ standing at Arafah on a red camel, delivering a sermon. So he inserted a man between Salama and his father.Abdullah bin Dawud, who is Abu Abdul-Rahman, known as Khuraybi, though he was trustworthy and reliable, may have made a mistake and inserted a man between Salama and his father. Or perhaps Salama bin Nubayt himself made the mistake, inserting a man between himself and his father toward the end of his life, since his memory became confused, as has been said. What he narrated during his period of confusion does not contradict what he narrated before that confusion. Allah knows best.As for Nubayt, in the diminutive form, bin Shurayt, he and his father were both companions of the Prophet.