A--- The Prophet (Peace be upon him) passed by 'Ammar and removed the dust off his head and said: "May Allah be Merciful to 'Ammar. He will be killed by a rebellious aggressive group. 'Ammar will invite them to (obey) Allah and they will invite him to the (Hell) fire." (Bukhari and Muslim) Thus, 'Ammar was on the side of ' Ali (May Allah be pleased with him) and he was killed by the people of Sham (Syria) while he was inviting them to obey Allah, the Prophetic Sunnah, Jama'ah (Community), and the true Imam: `Ali (May Allah be pleased with him). This Hadith is Authentic. Abu Sa'id Al-Khudri (May Allah be pleased with him) reported that Allah's Messenger (Peace be upon him) says: "A group would secede itself (from the Ummah) when there would be dissension among the Muslims. Out of the two groups who would be nearer the truth would kill them.” (Sahih Muslim) The Khawarij seceded itself from the Ummah and they were killed by 'Ali on the Day of Nahrawan. Thus, he is the nearer to the truth as agreed upon by the People of Sunni Islam.