Sahih al-Bukhari 4743
Sahih al-Bukhari · Book 65: Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh)) · The Statement of Allah the Exalted: "These two opponents (believers and disbelievers) dispute with each other about their Lord..." (V.22:19)
Narrated Qais bin Ubad:
حَدَّثَنَا حَجَّاجُ بْنُ مِنْهَالٍ ، حَدَّثَنَا هُشَيْمٌ ، أَخْبَرَنَا أَبُو هَاشِمٍ ، عَنْ أَبِي مِجْلَزٍ ، عَنْ قَيْسِ بْنِ عُبَادٍ ، عَنْ أَبِي ذَرٍّ ـ رضى الله عنه ـ 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 .
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 `Utbah and his two companions on the day when they ease out of the battle of Badr.