Musannaf Ibn Abi Shayba 37:106

Ibn ‘Uyaynah narrated to us, from al-Zuhri, from ‘Urwah, from Zaynab bint Abi Salamah, from Habib, from Umm Habibah, from Zaynab bint Jahsh, that she said: The Messenger of Allah (ﷺ) woke up from his sleep with his face flushed, saying: "There is no god but Allah. Woe to the Arabs from an evil that has drawn near. Today, a gap has been opened in the barrier of Gog and Magog," and he made a knot with his hand, meaning ten. Zaynab said: I said, "O Messenger of Allah, shall we perish while there are righteous people among us?" He said: "Yes, if wickedness increases."