Musannaf Ibn Abi Shaybah

Hazrat Abdullah bin Amr (may Allah be pleased with him) narrates that when the people withdrew their hands from the battle of Siffin, Hazrat Amr bin Al-Aas recited these verses: When the battle intensified, I prepared my shoulders and chest for it. When, due to swift running, the horses become weary, hardship will be met with hardship. My horse is broad-chested and big-bellied. Its height is moderate, and when it sees something or hears a sound, it pricks up its ears. And Hazrat Abdullah bin Amr (may Allah be pleased with him) recited these verses: If the woman named Jamal had seen my bravery at Siffin, her hair would have turned white. When the people of Iraq attacked like gathering clouds. We came upon our enemies to destroy them, our army like the waves of the sea. When, at the break of day, the battle intensified between us and them, neither did anyone turn his back nor did anyone flee. When someone says that they quickly turned their backs, in that time more of their army would appear. They say, pledge allegiance at the hand of Hazrat Ali (may Allah be pleased with him), we say, we will fight. (According to the research of Muhammad Awwama, the attribution of these verses to these esteemed companions is not correct. He has proven his stance with many evidences. See: Musannaf Ibn Abi Shaybah, vol. 13, page 304)