Abu Dawud
Trials And Fierce Battles
Book Number: 030 / Hadith Number: 4264
Narated By Sa'id ibn Zayd : We were with the Prophet (pbuh). He mentioned civil strife (fitnah) and expressed its gravity. We or the people said: Apostle of Allah, if this happens to us it will destroy us. The Apostle of Allah (pbuh) said; No. It is enough for you that you would be killed. Sa'id said: I saw that my brethren were killed.