Even then the Commander of the Faithful did not give up...
Even then the Commander of the Faithful did not give up advising those people to come to the right path. He also impressed upon his soldiers not to take the initiative in starting the battle. However, the Kharijites suddenly raised their slogan: “There is no judge except God” and attacked Ali's army with full force. Thereupon the Commander of the Faithful and his soldiers also drew their swords and the dreadful Battle of Nahrawan started.
When fighting came to an end almost all the Kharijites were killed. Only four hundred persons survived, who had also sustained serious wounds. Had they not been half-dead owing to their wounds it was possible that they too might have died fighting, or would have gained victory. Ali ordered these persons to be dealt with kindness and handed over to their families and tribes, so that they might make arrangements for their proper treatment.
After having dealt with the Kharijites Ali desired to proceed to Syria to punish Mu`awiya. However, this time also Ash`ath bin Qais frustrated his plans by his deceitful activities. He made a large number of soldiers desert the army and hide themselves in adjoining cities. He argued that the soldiers had got tired of fighting for a long time and needed rest. He added that they would rejoin the army after they had taken rest and become fresh.
The Commander of the Faithful returned to Kufa to make preparation for attacking Syria. Mu`awiya's own army was faithful to him and the Kharijites also helped him unconsciously by fighting against Ali. As regards Ash`ath bin Qais, the historians say that in his heart of hearts he was a supporter and sympathiser of Mu`awiya .Some historians have stated clearly that he went to Damascus, met Mu`awiya, obtained enormous wealth from him and began awaiting future developments.
* * * * * * * * At this stage fate shot an arrow at Ali to which that great man fell victim and thereby his enemies achieved their object. However, this success of his enemies was not the result of their deceit, cleverness, wisdom, strength or prudence. It was a sheer chance and a sudden accident which paved the way for their success. Some fanatical Kharijites assembled at a place and began talking about their friends and kinsmen who were killed in the Battle of Nahrawan.
They expressed the view that the responsibility for the bloodshed lay on the shoulders of three persons who were, according to their belief, the leaders of those who had deviated from the right path viz.