Narrated from Zainab bint Jahsh (may Allah be pleased with her) that one day the Messenger of Allah (peace and blessings be upon him) came to me in a state of anxiety, and he was saying: "There is no deity worthy of worship except Allah. Woe to the Arabs because of an evil that has drawn near! Today, a hole as big as this has been opened in the barrier of Gog and Magog." And he (peace and blessings be upon him) made a circle with his thumb and index finger. 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 and blessings be upon him) said: "Yes, when wickedness becomes prevalent." Agreed upon.