Sayyidah Zaynab bint Jahsh (RA) narrated Allah’s Messenger (SAW) got up from sleep once and his face had turned red. He was reciting, 'There is no God but Allah.' He repeated it three times. “There is trouble for the Arabs from this mischief which is near. he waH of Yajuj and Majuj has been opened this much”, indicating with his fingers a round circle. Sayyidah Zaynab (RA) said, “O Messenger of Allah, (SAW) will they perish while we, righteous people are among them?” He said, “Yes if evil overwhelms.”
[Bukhari 3346, Muslim 2880]