Chapter on the Sanctity and Virtue of Medina
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 3|Chapter 154
وَ رُوِيَ: أَنَّ اَلصَّادِقَ عَلَيْهِ اَلسَّلاَمُ ذَكَرَ اَلدَّجَّالَ فَقَالَ «لاَ يَبْقَى مِنْهَا سَهْلٌ إِلاَّ وَطِئَهُ إِلاَّ مَكَّةَ وَ اَلْمَدِينَةَ فَإِنَّ عَلَى كُلِّ نَقْبٍ مِنْ أَنْقَابِهِمَا مَلَكاً يَحْفَظُهُمَا مِنَ اَلطَّاعُونِ وَ اَلدَّجَّالِ ».
It is narrated that Imam Jafar ibn Muhammad Al-Sadiq عليه السلام mentioned the Dajjal and said: "There will not remain any plain area except that he will tread upon it, except Mecca and Medina, for at every entrance to them, there is an angel protecting them from plague and the Dajjal."
- Ṣaḥīḥ al-Faqīh