Said bin Al-Musaiyab:
When the first civil strife (in Islam)
took place because of the murder of 'Uthman, it left none of the Badr
warriors alive. When the second civil strife, that is the battle of
Al-Harra, took place, it left none of the Hudaibiya treaty companions
alive. Then the third civil strife took place and it did not subside
till it had exhausted all the strength of the people.