Sahih Muslim Book 41, Hadith Number 6936.
Chapter : The Last Hour would not come until the fire emits from the earth of Hijaz.
Abu Huraira reported that Allah’s Messenger (may peace be upon him) said: (The Last Hour would not come) until the habitations of Medina would extend to Ihab or Yahab. Zubair said: I said to Suhail how far these were from Medina. He said: So and so miles.