Sahih Bukhari
Afflictions and the End of the World
Volume: 009 / Book Number: 088 / Hadith Number: 241
Narrated Abdullah bin Umar:
Allah's Apostle stood up amongst the people and then praised and glorified Allah as He deserved and then he mentioned Ad-Dajjal, saying, "I warn you of him, and there was no prophet but warned his followers of him; but I will tell you something about him which no prophet has told his followers: Ad-Dajjal is one-eyed whereas Allah is not."