Muhammad bin Umar said that Hashim al-A'war was the son of Utbah bin Abi Waqqas bin Uhayb bin Abd Manaf bin Zuhrah. He accepted Islam on the day of the Conquest of Makkah. He was one-eyed; one of his eyes was lost on the day of the Battle of Yarmuk. He was the nephew of Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him). He took part in the Battle of Siffin alongside Sayyiduna Ali bin Abi Talib (may Allah be pleased with him), and on that day he was the commander of the infantry.