Mukhtasar Bukhari

Narrated from Umm al-Mu'mineen Zainab bint Jahsh (may Allah be pleased with her) that the Prophet (peace and blessings of Allah be upon him) came to her in a state of anxiety and said: "La ilaha illallah! Woe to the Arabs because of an evil that has drawn near. Today, a hole has been made in the wall of Gog and Magog as large as this." The Prophet (peace be upon him) made a circle with his thumb and index finger to illustrate. Umm al-Mu'mineen Zainab (may Allah be pleased with her) said: I asked, "O Messenger of Allah! Will we be destroyed while there are righteous people among us?" He (peace be upon him) replied: "Yes, when evil becomes widespread (then both the righteous and the wicked are overtaken)."