Musannaf Ibn Abi Shaybah

Hazrat Iyad Ash'ari says that I participated in the Battle of Yarmouk. In it, we had five commanders: Hazrat Abu Ubaidah bin Jarrah, Hazrat Yazid bin Abi Sufyan, Hazrat Ibn Hasnah, Hazrat Khalid bin Walid, and Hazrat Iyad. And Hazrat Umar had said that when the battle takes place, you must obey Hazrat Abu Ubaidah. Then, in this battle, we were surrounded by severe dangers, so we sought help from Hazrat Umar. He replied in writing that your letter has reached me in which you have asked me for help. I advise you to seek help from Allah, whose help is most dominant and whose army is the strongest, and the Prophet ﷺ defeated the enemy in the Battle of Badr with fewer numbers than you. When this letter of mine reaches you, do not turn to me again. After receiving this letter, we fought bravely and defeated the enemy. We fought them for four farsakhs and obtained a lot of wealth. Then we consulted among ourselves about the distribution of the wealth, so Hazrat Iyad suggested that each person should be given ten. Then Hazrat Abu Ubaidah said, "Who will race with me?" A young man said, "If you are not displeased, I will race with you." Then that young man went ahead. The narrator says that I saw Hazrat Abu Ubaidah on his Arabian horse behind that young man, and the braids of his hair were flying.