‏الحج : Hadeeth No:3186 Abu Huraira (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: There are at the approaches of Medina angels so that plague and the Dajjal shall not penetrate into it....

‏الجهاد والسير‏ : Hadeeth No:4421 It has been narrated on the authority of Ibn Mas'ud who said: While the Messenger of Allaah (sallAllaahu alayhi wa sallam) was saying his prayer near the Ka'ba and Abu Jahl with his companions was sitting (near by), Abu Jahl said, referring to the she-camel that had been slaughtered the previous day...