Alternative sources for this sermon
(see Bibliography for details of these texts)
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. 
Footnotes by translator:
This prophecy of Amir al-mu'minin also proved true word by word. Every chief of Kharijites who rose was put to sword. A few of their chiefs who were badly put to death are mentioned here:
1)Nafi` ibn Azraq al-Hanafi: the largest group of the Kharijites namely al-Azariqah is named after him. He was killed by Salamah al-Bahili during encounter with the army of Muslim ibn `Ubays.
2)Najdah ibn `Amir: the an-Najadat al-`Adhiriyyah sect of Kharijites is named after him. Abu Fudayk al-Khariji got him killed.
3)`Abdullah ibn Ibad at-Tamimi: the sect Ibadite (Ibadiyyah) is named after him. He was killed during encounter with `Abdullah ibn Muhammad ibn `Atiyyah.
4)Abu Bayhas Haysam ibn Jabir ad-Duba`i: the sect of al-Bayhasiyyah is named after him. `Uthman ibn Hayyan al-Murri the governor of Medina got his hands and feet severed and then killed him.
5)`Urwah ibn Udayyah at-Tamimi: Ziyad ibn Abih killed him during the reign of Mu`awiyah.
6)Qatari ibn al-Fuja'h al-Mazini at-Tamimi: when he encountered the army of Sufyan ibn al-Abrad al-Kalbi in Tabarastan then Sawrah ibn al-Hurr ad-Darimi killed him.
7)Abu Bilal Mirdas ibn Udayyah at-Tamimi: was killed in encounter with `Abbas ibn Akhdar al-Mazini.
8)Shawdhab al-Khariji al-Yashkuri: was killed during encounter with Sa`id ibn `Amr al-Harashi.
9)Hawtharah ibn Wada` al-Asadi: was killed at the hands of a man of Banu Tayyi'
10)al-Mustawrid ibn `Ullafah at-Taymi: was killed by Ma`qil ibn Qays ar-Riyahi in the reign of Mu`awiyah.
11)Shabib ibn Yazid ash-Shaybani: died by being drowned in river.
12)`Imran ibn al-Harith ar-Rasibi: was killed in the battle of Dulab.
13, 14)Zahhaf at-Ta'i and Qurayb ibn Murrah al-Azdi: were killed in encounter with Banu Tahiyah.
15)az-Zubayr ibn `Ali as-Saliti at-Tamimi: was killed in encounter with `Attab ibn Warqa' ar-Riyahi.
16)`Ali ibn Bashir ibn al-Mahz al-Yarbu`i: al-Hajjaj ibn Yusuf ath-Thaqafi got him killed.
17)`Ubaydullah ibn Bashir:was killed in encounter with al-Muhallab ibn Abi Sufrah in the battle of Dulab.
18)Abu'l-Wazi` ar-Rasibi: a man in the graveyard of Banu Yashkur felled a wall on him and killed him.
19)`Abdu Rabbih as-Saghir: was killed in encounter with al-Muhallab ibn Abi Sufrah.
20)Al-Walid ibn Tarif ash-Shaybani: was killed in encounter with Yazid ibn Mazyad ash-Shaybani.
21-24)`Abdullah ibn Yahya al-Kindi, al-Mukhtar ibn `Awf al-Azdi (Abu Hamzah ash-Shari), Abrahah ibn as-Sabbah and Balj ibn `Uqbah al-Asadi: were killed by `Abd al-Malik ibn `Atiyyah as-Sa`di in the reign of Marwan ibn Muhammad (the last of the Umayyad caliphs).