Abu Dharr used to take an oath confirming that the Verse: 'These two opponents (believers, and disbelievers) dispute with each other about their Lord.' (22.19) was Revealed in connection with Hamza and his two companions and ʿUtbah and his two companions on the day when they ease out of the battle of Badr.
أَنَّهُ كَانَ يُقْسِمُ فِيهَا إِنَّ هَذِهِ الآيَةَ {هَذَانِ خَصْمَانِ اخْتَصَمُوا فِي رَبِّهِمْ} نَزَلَتْ فِي حَمْزَةَ وَصَاحِبَيْهِ وَعُتْبَةَ وَصَاحِبَيْهِ يَوْمَ بَرَزُوا فِي يَوْمِ بَدْرٍ رَوَاهُ سُفْيَانُ عَنْ أَبِي هَاشِمٍ وَقَالَ عُثْمَانُ عَنْ جَرِيرٍ عَنْ مَنْصُورٍ عَنْ أَبِي هَاشِمٍ عَنْ أَبِي مِجْلَزٍ قَوْلَهُ