Musannaf Ibn Abi Shayba 36:176

Yazid ibn Harun narrated to us, he said: Sulayman al-Taymi informed us, from Abu Mijlaz, from Qays ibn 'Abbad, who said: 'Ali, Hamzah, and 'Ubaydah ibn al-Harith engaged in single combat with 'Utbah ibn Rabi'ah, Shaybah ibn Rabi'ah, and al-Walid ibn 'Utbah. And concerning them was revealed: "These two adversaries who have disputed over their Lord."