Sahih Muslim | Book 41 | Hadith Number 7007

Narrated by Anas b. Malik
Anas b. Malik reported that Allah's Messenger (may peace be upon him) said: There is never a prophet who has not warned the Ummah of that one-eyed liar; behold he is one- eyed and your Lord is not one-eyed. On his forehead are the letters k.f.r (Kafir).