Musnad Ahmad 830:147

Mu'ammal narrated to us, Hammad narrated to us, 'Ali ibn Zayd informed us, from 'Abd al-Rahman ibn Abi Bakrah, from his father, who said: The Messenger of Allah (may Allah bless him and grant him peace) described one day the description of the Dajjal and the description of his parents. He said: "The parents of the Dajjal will remain for thirty years without a child being born to them. Then a son will be born to them, joyful and circumcised, the least of things in benefit and the most harmful of them. His eyes will sleep, but his heart will not sleep." Then he mentioned it, except that he said: "Then this one was born to us, one-eyed, joyful, circumcised, the least of things in benefit and the most harmful of them."