Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Hudhaifah (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: I know well the deception that will be with the Dajjal. He will have two streams with him; one of them will appear, to the onlooker, as white water, and the other will appear as a blazing fire. If anyone is faced with this situation, he should enter into what he perceives as fire, close his eyes, then lower his head to drink from it, for it will be cool water. And indeed, the Dajjal will have a damaged eye; over his eye will be a thick piece of skin (a disease called "zafrah" due to which a membrane like a nose covers the eye). Between his two eyes will be written "Kafir" (disbeliever), which every believer will be able to read, whether he is literate or illiterate.