'Abdullah bin Khabbab (RAA) narrated, 'I heard my father say:
'I heard the Messenger of Allah (ﷺ) say, "There will be times of Fitan, so O slave of Allah be in it the one who is killed and do not be the killer." Related by Abu Khaithamah and Ad-Daraqutni. (ID)
English reference (ID): Book 10, Hadith 1296 (ID)
Arabic reference (ID): Book 10, Hadith 1257 (ID)