Hadith 6804
Sayyiduna Anas (may Allah be pleased with him) narrates this statement of the Prophet Muhammad (peace and blessings be upon him): "When Dajjal comes near Madinah, he will find angels: they will be guarding it, so Dajjal will not be able to enter Madinah, nor will the plague be able to enter it, if Allah wills."