Musnad Ahmad 1018:29

Yazid narrated to us, Ibn 'Awn informed us, from Mujahid, who said: We were for six years under the leadership of Junadah ibn Abi Umayyah. He stood up and addressed us, saying: We came to a man from the Ansar, one of the companions of the Messenger of Allah (peace and blessings of Allah be upon him). We entered upon him and said: "Narrate to us what you heard from the Messenger of Allah (peace and blessings of Allah be upon him), and do not narrate to us what you heard from the people." We pressed him, so he said: The Messenger of Allah (peace and blessings of Allah be upon him) stood among us and said: "I warn you of the Messiah, and he is one-eyed." He said: I think he said, "the left [eye]." "Mountains of bread and rivers of water travel with him. His sign is that he will remain on the earth for forty mornings; his authority will reach every watering place. He will not approach four mosques: the Ka'bah, the Mosque of the Messenger, the Al-Aqsa Mosque, and the Mount [Sinai]. Whatever is other than that, know that Allah is not one-eyed." Ibn 'Awn said: And I think he said: "He will be given power over a man, so he will kill him, then he will bring him back to life, and he will not be given power over anyone else."