Hadith 192

and I saw the man performing Sajdah. I said, ‘By Allah-azwj! I will not kill him, for he was safe from the one who is better than me’. So, I returned to Rasool-Allah-saww and said, ‘O Rasool-Allah-azwj! I saw the man in Sajdah’. He-saww said: ‘O Umar! Sit down, for you aren’t its performer. Stand, O Ali-asws, for you-asws are his killer. If you-asws find him, kill him, for if you-asws do kill him, the differing would not occur between my-saww community, ever’. Ali-asws said: ‘I-asws grabbed the sword and entered the Masjid, but did not see him, so I-asws returned to Rasool-Allah-saww and said: ‘O Rasool-Allah-saww! I-asws did not see him’. He-saww said: ‘O Abu Al-Hassan-asws! The community of Musa-as separated into seventy-one sects, one sect will attain salvation and the remainder would be in the Fire; and the community of Isa-as separated into seventy-two sects, one sect will attain salvation and the remainder would be in the Fire; and my-saww community will separate into seventy-three sects, one sec will attain salvation and the remainder would be in the Fire’. I-asws said: ‘O Rasool-Allah-saww! And who are the ones attain salvation? ’ He-saww said: ‘The adherent with what you-asws and your-asws companions are upon. Allah-azwj the Exalted Revealed regarding that man: Twisting his neck haughtily [22: 9]’. He-saww said: ‘This is the first one to appear from the companions of the innovations and the straying’. Ibn Abbas said, ‘By Allah-azwj! No one killed that man except Amir Al Momineen-asws on the day (battle of) Siffeen. For him would is disgrace in the world, – he said, ‘The killing’ – and on the Day of Judgment We will Make him taste the Punishment of burning [22: 9], due to his being killed by Ali Bin Abu Talib-asws on the day (battle of) Siffeen’’. [158] (Non-Shia source)