Sahih al-Bukhari 4744
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 مُعْتَمِرُ بْنُ سُلَيْمَانَ ، قَالَ سَمِعْتُ أَبِي قَالَ، حَدَّثَنَا أَبُو مِجْلَزٍ ، عَنْ قَيْسِ بْنِ عُبَادٍ ، عَنْ عَلِيِّ بْنِ أَبِي طَالِبٍ ـ رضى الله عنه ـ قَالَ أَنَا أَوَّلُ، مَنْ يَجْثُو بَيْنَ يَدَىِ الرَّحْمَنِ لِلْخُصُومَةِ يَوْمَ الْقِيَامَةِ. قَالَ قَيْسٌ وَفِيهِمْ نَزَلَتْ {هَذَانِ خَصْمَانِ اخْتَصَمُوا فِي رَبِّهِمْ} قَالَ هُمُ الَّذِينَ بَارَزُوا يَوْمَ بَدْرٍ عَلِيٌّ وَحَمْزَةُ وَعُبَيْدَةُ وَشَيْبَةُ بْنُ رَبِيعَةَ وَعُتْبَةُ بْنُ رَبِيعَةَ وَالْوَلِيدُ بْنُ عُتْبَةَ.
`Ali said, "I will be the first to kneel before the Beneficent on the Day of Resurrection because of the dispute." Qais said; This Verse: 'These two opponents (believers and disbelievers dispute with each other about their Lord,' (22.19) was revealed in connection with those who came out for the Battle of Badr, i.e. `Ali, Hamza, 'Ubaida, Shaiba bin Rabi`a, `Utba bin Rabi`a and Al-Walid bin `Utba.