Mukhtasar Bukhari

Narrated by Sayyiduna Anas bin Malik (may Allah be pleased with him) from the Noble Prophet (peace and blessings be upon him) that he (peace be upon him) said: "The Dajjal will certainly trample every city in the world except Makkah and Madinah. On every path to these two, angels will stand in rows as guards. Then Madinah will shake its people three times with great force, and Allah will expel every disbeliever and hypocrite (who will be present in Madinah at that time)."