It is narrated from Sayyiduna Hudhayfah bin Asid that once the Prophet (peace and blessings be upon him) was in an upper room and we were below discussing the Day of Resurrection. The Prophet (peace and blessings be upon him) looked towards us and asked, "What are you discussing?" We replied, "We are mentioning the Day of Resurrection." The Prophet (peace and blessings be upon him) said, "The Hour will not be established until you see ten signs: smoke, Dajjal, the beast of the earth, the rising of the sun from the west, the descent of Sayyiduna Isa, the emergence of Gog and Magog, and three incidents of the earth sinking—one in the east, one in the west, and one in the Arabian Peninsula. And the last of them will be a fire that will emerge from the direction of the bottom of Aden and will gather the people, driving them to Sham. Wherever they camp, it will camp with them, and wherever they take a midday rest, it will rest with them."