Sunan Ibn Majah, Chapter: The Chapters on Jihad

"I heard Abu Dharr swearing that these verses were revealed concerning those six people on the Day of Badr: 'These two opponents (believers and disbelievers) dispute with each other about their Lord."[22:19] to the words "Verily, Allah does what he wills.'[22:14] (that is) Hamzah bin 'Abdul-Muttalib, Ali bin Abi Talib, 'Ubaidah bin Al-Harith, 'Utbah bin Rabi'ah, Shaibah bin Rabi'ah and Al-Walid bin 'Utbah. They argued with one another on the Day of Badr."