Jami` at-Tirmidhi 3735
جامع الترمذي#3735Sahihحَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، وَمُحَمَّدُ بْنُ الْمُثَنَّى، قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ عَمْرِو بْنِ مُرَّةَ، عَنْ أَبِي حَمْزَةَ، رَجُلٌ مِنَ الأَنْصَارِ قَالَ سَمِعْتُ زَيْدَ بْنَ أَرْقَمَ، يَقُولُ أَوَّلُ مَنْ أَسْلَمَ عَلِيٌّ . قَالَ عَمْرُو بْنُ مُرَّةَ فَذَكَرْتُ ذَلِكَ لإِبْرَاهِيمَ النَّخَعِيِّ فَأَنْكَرَهُ وَقَالَ أَوَّلُ مَنْ أَسْلَمَ أَبُو بَكْرٍ الصِّدِّيقُ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ . وَأَبُو حَمْزَةَ اسْمُهُ طَلْحَةُ بْنُ يَزِيدَ .
Narrated a man from the Ansar:that Zaid bin Al-Arqam said: "The first to accept Islam was 'Ali." 'Amr bin Murrah said: "So I mentioned that to Ibrahim An-Nakha'i, so he rejected that and said: 'The first to accept Islam was Abu Bakr As-Siddiq
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:
Our source also lists this ruling under Ahmad Muhammad Shakir, the editor of the printed edition it was taken from. It is al-Albani's ruling printed again, so it is counted once.
In-book reference: 49:132