When Ameerul Momineen showed his intention to fight the Kharijites he was told that they had crossed the bridge of Nahrawan and gone over to the other side. Imam said:

Their falling place is on this side of the river. By Allah, not even ten of them will survive while from your side not even ten will be killed.

When Ameerul Momineen was told that the Kharijites had been totally killed, he said: By Allah, no, not yet. They still exist in the loins of men and wombs of women. Whenever a chief would appear from among them, he would be cut down till the last of them would turn thieves and robbers. Imam also said: Do not fight the Kharijites after me, because one who seeks right but does not find it, is not like one who seeks wrong and finds it.