وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نُعَيْمِ بْنِ عَبْدِ اللَّهِ الْمُجْمِرِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّهُ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ عَلَى أَنْقَابِ الْمَدِينَةِ مَلاَئِكَةٌ لاَ يَدْخُلُهَا الطَّاعُونُ وَلاَ الدَّجَّالُ

Yahya related to me from Malik from Nuaym ibn Abdullah al-Mujmirthat Abu Hurayra said, "The Messenger of Allah, may Allah bless himand grant him peace, said, 'There are angels at the entries of Madina,and neither plague nor the Dajjal will enter it.' " Translation Not Available

Book Ref: Muwatta Imam Malik Book 45 Hadith 1616
Web Ref:  Muwatta Imam Malik Book 45 Hadith 16