Afflictions and the End of the World
كتاب الفتن
Chapter 27: Ad-Dajjal will not be able to enter Al-Madina
Allah's Messenger (ﷺ) said, "There are angels at the mountain passes of Medina (so that) neither plague nor Ad-Dajjal can enter it.'
The Prophet (ﷺ) said, "Ad-Dajjal will come to Medina and find the angels guarding it. So Allah willing, neither Ad-Dajjal, nor plague will be able to come near it."
Chapter 28: Ya’juj and Ma’juj
That one day Allah's Messenger (ﷺ) entered upon her in a state of fear and said, "None has the right to be worshipped but Allah! Woe to the Arabs from the Great evil that has approached (them). Today a hole has been opened in the dam of Gog and Magog like this." The Prophet (ﷺ) made a circle with his index finger and thumb. Zainab bint Jahsh added: I said, "O Alllah's Apostle! Shall we be destroyed though there will be righteous people among us?" The Prophet (ﷺ) said, "Yes, if the (number) of evil (persons) increased."
The Prophet (ﷺ) said, "A hole has been opened in the dam of Gog and Magog." Wuhaib (the sub-narrator) made the number 90 (with his index finger and thumb).