From Sahih Bukhari (Hadith 7407):
Narrated `Abdullah:Ad-Dajjal was mentioned in the presence of the Prophet. The Prophet (ﷺ) 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
Reference: Bukhari 7407