Sayyiduna Hudhayfah bin Asid (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) looked down from an upper room while we were discussing the Hour, and he (peace and blessings be upon him) said: "The Hour will not be established until there are ten signs: the Dajjal, the Smoke, the rising of the sun from the west, the Beast of the Earth, Ya'juj and Ma'juj, and three sinkings of the earth: in the east, in the west, and in the Arabian Peninsula, and a fire that will come out of the depths of Aden Abyan and drive the people towards the place of gathering: where they halt for the night it will halt too, and where they rest at midday it will stop too."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3018