Yahya related to me from Malik from Nuaym ibn Abdullah al-Mujmir that Abu Hurayra said, "The Messenger of Allah, may Allah bless him and grant him peace, said, 'There are angels at the entries of Madina, and neither plague nor the Dajjal will enter it.' "


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
USC-MSA web (English) reference : Book 45, Hadith 16
Arabic reference : Book 45, Hadith 1616