Sahih al-Bukhari, Hadith 4744 ⓘ
Narrated Qais bin Ubad: `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.
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.
also referenced under: Book 65, Hadith 4744 (In-Book) & Volume 6, Book 60, Hadith 268 (USC-MSA)