Musnad Ahmad 27:1684

Ya'qub narrated to us, my father narrated to us, from Salih, Nafi' narrated to us, that Abdullah ibn Umar said: The Messenger of Allah, peace and blessings of Allah be upon him, stood up and mentioned the False Messiah (Al-Masih ad-Dajjal), and said: "Indeed, Allah the Exalted is not one-eyed. Behold, the False Messiah is blind in his right eye, as if his eye is a floating grape."