Musnad Abu Ya'la al-Mawsili 115:232

Ubayd Allah narrated to us, Mu'adh narrated to us, my father narrated to me, from Qatadah, from Anas bin Malik, that the Prophet of Allah (peace be upon him) said: "Written between his eyes is K-F-R." Abu Sa'id said: "Meaning: Kafir (disbeliever)." Qatadah said: "And it was mentioned to us that every believer, whether illiterate or literate, will read it. He will emerge during a scarcity of people and a shortage of food. He will enter all the cities of the Arabs except Tayyibah, and it is Al-Madinah." A speaker said: "O Prophet of Allah, does he not want Al-Madinah?" He said: "Yes, but the angels are lined up at its mountain passes, guarding it."