The Messenger of Allah ﷺ said, "At the entrances of Madinah are angels, so neither plague nor the Dajjal can enter it."
قال رسول الله ﷺ: على أنقاب المدينة ملائكة لا يدخلها الطاعون ولا الدجال.
Malik narrated it in Jami (16) from Naeem bin Abdullah Mujmir, from Abu Hurairah, who related it.Bukhari narrated it in the Virtues of Madinah (1880), and Muslim in Hajj (485:1379), both of them through the route of Malik with this chain.