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.
Sahih al-Bukhari Book 64, Hadith 19