As for 'Ali...

As for 'Ali, since he accepted the arbitration, but did not subsequently repent, he was killed as an unbeliever and his killing was a religious duty. Thus they denounced the caliphate of `Uthman after its seventh year, and that of 'Ali after the arbitration.[^3] They also abhorred the rest of the caliphs, and were always at war with them. [^1]: . See sermon no.40, and also the commentary of Ibn Abi ' l-Hadid, vol.2, p.308 [^2]: . See Ibn Kathir, al-Kamil fi 't-tarikh. [^3]: .