When Amir al-mu'minin 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. 1
(1) Al-Bayhaqi, al-Mahasin, 385;
(3) al-Mubarrad, al-Kamil, II, 120.