It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that he said: "I saw the Messenger of Allah (peace and blessings be upon him) during the Farewell Hajj riding a whitish-grey mule, while Sayyiduna Khalid bin al-Walid (may Allah be pleased with him) was holding its reins and leading it."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Rashid (may Allah have mercy on him) except Abu Damrah (may Allah have mercy on him), and Yahya bin Uthman bin Sa'id (may Allah have mercy on him) is alone in transmitting it."