The Book Pertaining to the Turmoil and Portents of the Last Hour (Kitab Al-Fitan wa Ashrat As-Sa`ah)
Muslim :: Book 41 : Hadith 6935
Abu Huraira reported that Allah's Messenger may peace be upon him) said: The Last Hour would not come until fire emits from the earth of Hijaz which would illuminate the necks of the camels of the Busra.