´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.'"
Hadith ReferenceSunan at-Tirmidhi / Chapters on Virtues / Hadith: 3735
Hadith Gradingالألبانی:صحيح الإسناد عن زيد، متصل عن النخعى