Musnad Abu Ya'la al-Mawsili 243:62

Al-Qasim ibn Yahya narrated to us, Al-Walid ibn Muslim narrated to us, Abu Sa'id Rawh ibn Janah narrated to us, from a freed slave of Umar ibn Abd al-Aziz, from Abu Burdah, from his father, from the Prophet (peace be upon him): "The Day when the shin will be uncovered." He said: "It is a great light, for which they will fall down in prostration."