Narrated Zainab bint Jahsh: That the Prophet once came to her in a state of fear and said, None has the right to be worshipped but Allah. Woe unto the Arabs from a danger that has come near. An opening has been made in the wall of Gog and Magog like this, making a circle with his thumb and index finger. Zainab bint Jahsh said, O Allah's Apostle! Shall we be destroyed even though there are pious persons among us? He said, Yes, when the evil person will increase.