Musnad Abu Ya'la al-Mawsili 225:2

Ishaq and Harun al-Hammal narrated to us—the wording being Ishaq’s—they said: Sufyan narrated to us, from al-Zuhri, from Urwah, from Zaynab, from Habibah, from Umm Habibah, from Zaynab, that the Prophet (peace and blessings of Allah be upon him) woke up from 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 like this." Zaynab said: "O Messenger of Allah, shall we perish while there are righteous people among us?" He said: "Yes, if wickedness increases."