Sahih Bukhari

Narrated Zainab bint Jahsh: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 Allah'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