Abd-al-Rahman ibn Muljam
Abd-al-Rahman ibn Muljam al-Muradi was the Kharijite assassin of Ali ibn Abi Talib, the first cousin and son-in-law of Muhammad. A number of the Kharijites met in Mecca and remembered the Battle of Nahrawan that was fought in 659 by the Caliphate under Ali and the Kharijites in Baghdad which resulted in Khariji defeat. One of the Kharijis said "If we just bought ourselves revenge for the honour of our deceased brothers". They agreed to assassinate three of the leaders of Islam: ibn Muljam was to kill Ali, and Alhujjaj Al Tamimi was to kill Muawiya, and Amr ibn Bakr Al Tamimi was to kill 'Amr ibn al-'Aas. The assassination attempts were to occur simultaneously as the three leaders came to lead the morning prayer in their respective cities of Damascus, Fustat and Kufa. The method was to come out of the prayer ranks and strike the targets with a sword dipped in poison.