(7) باب فِي قَوْلِهِ تَعَالَى {هَذَانِ خَصْمَانِ اخْتَصَمُوا فِي رَبِّهِمْ}
Abu Dharr took an oath that this verse:
" These two adversaries who dispute about their Lord" (xxii. 19) was revealed in connection with those who on the Day of Badr came out (of rows to fight against the non-believers and they were) Hamza, 'Ali, 'Ubaida b. Harith (from the side of the Muslims) and 'Utba and Shaiba, both of them the sons of Rabi'a and Walid b. 'Utba (from the side of the non-believers of Mecca).
Reference: Sahih Muslim 3033 a
In-book reference: Book 56, Hadith 39
USC-MSA web (English) reference(deprecated numbering scheme): Book 43, Hadith 7189