Sahih Bukhari Volume 5, Book 59, Hadith Number 305.

Narrated By Abu Dhar: The following Holy Verse: “These two opponents (believers & disbelievers) dispute with each other about their Lord,” (22.19) was revealed concerning six men from Quraish, namely, ‘Ali, Hamza, ‘Ubaida bin Al-Harith; Shaiba bin Rabi’a, ‘Utba bin Rabi’a and Al-Walid bin ‘Utba.