Sahih Bukhari | Volume 9 | Hadith Number 245
Narrated by Anas
The Prophet said, "No prophet was sent but that he warned his followers against the one- eyed liar (Ad-Dajjal). Beware! He is blind in one eye, and your Lord is not so, and there will be written between his (Ad-Dajjal's) eyes (the word) Kafir (i.e., disbeliever)." (This Hadith is also quoted by Abu Huraira and Ibn 'Abbas).