Ibn 'Abbas said: "The first to perform Salat was 'Ali."
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.'"