Sahih al-Bukhari 2879

It is related that 'Awf ibn Malik said, "I went to the Prophet, may Allah bless him and grant him peace, during the Tabuk expedition while he was in a hide tent. He said, 'Count six signs before the Final Hour: my death, then the conquest of Jerusalem, then a plague which will carry you off like the sheep disease, then the increase of wealth so that a man will be given a hundred dinars and remain displeased, then a civil war (fitna) which will not fail to enter every house of the Arabs, and then a truce between you and the Greeks who will act treacherously and come at you under eighty flags with twelve thousand men under every flag.'" XVI: How to revoke a treaty The words of Allah, "If you fear treachery on a people's part, revoke your treaty with them mutually...." (8:58)