It is narrated from Sayyiduna Saeed bin Zaid (may Allah be pleased with him), the Messenger of Allah (peace and blessings be upon him) mentioned tribulations like the darkness of dark nights. I think he (peace and blessings be upon him) also said: In these tribulations, people will perish very quickly. Someone asked: Will all of them be destroyed or only some of them? He (peace and blessings be upon him) replied: Their being killed will be enough for them.