Sahih Bukhari Volume 009, Book 093, Hadith Number 504.

Narrated By 'Abdullah : Ad-Dajjal was mentioned in the presence of the Prophet. The Prophet said, "Allah is not hidden from you; He is not one-eyed," and pointed with his hand towards his eye, adding, "While Al-Masih Ad-Dajjal is blind in the right eye and his eye looks like a protruding grape."