Allah's Apostle said, Shall I not tell you about the Dajjal a story ...

Hadith 4:554

Narrated Abu Huraira:

Allah's Apostle said, "Shall I not tell you about the Dajjal a story of which no prophet told his nation? The Dajjall is one-eyed and will bring with him what will resemble Hell and Paradise, and what he will call Paradise will be actually Hell; so I warn you (against him) as Noah warned his nation against him."