Abu Huraira reported God's messenger as saying, “The last hour will not come before Medina drives away its wicked people as the bellows drives away the impurity of iron."
Anas reported God’s messenger as saying, “There is no town on which the dajjal will not tread, with the exception of Mecca and Medina. There is none of its mountain paths which does not have angels in it drawn up in rows and guarding it. He will then go down to the marshy land, and Medina will put its people into commotion three times; then every infidel and hypocrite will go out to him.”
Jabir b. ‘Abdallah told of a desert Arab who had sworn allegiance to God’s messenger, but who, when he suffered from a bout of fever in Medina, came to the Prophet and said, "Cancel my oath of allegiance, Muhammad;” but God’s messenger refused. He came again with the same request and again he refused. He came once more with the same request, and when he again refused, the desert Arab went off. God’s messenger then said, "Medina is like bellows which drives away its impurity and purifies what is good in it.”
