Sahih Muslim Book 41, Hadith Number 7039.
Chapter : The Remaining Ahadith Pertaining to the Dajjal.
Abu Huraira reported Allah’s Messenger (may peace be upon him) having said: Hasten to do good deeds before six things happen: the rising of the sun from the west, the smoke, the Dajjal, the beast and (the death) of one of you or the general turmoil.