Musnad Ahmad 32:1202

Rawh narrated to us, Sa'id and 'Abd al-Wahhab narrated to us, Sa'id informed us, from Qatadah, from Anas ibn Malik, that a person among the people said: "O Prophet of Allah, does the Dajjal not intend to enter Medina?" He said: "He will indeed head toward it, but he will find the angels lined up at its mountain passes and its gates, guarding it from the Dajjal." 'Abd al-Wahhab said in his narration: Qatadah said: Anas ibn Malik narrated to us that the Prophet of Allah, peace and blessings of Allah be upon him, said: "Written between his eyes is: K-F-R (Kafir), which every believer, whether illiterate or literate, will read."