The Messenger of Allah ﷺ said, "There has been no prophet who did not warn his people of the one-eyed liar. He is indeed one-eyed, but your Lord is not one-eyed. Written between his eyes are the letters K-F-R."This is a hasan sahih hadith.
حدثنا محمد بن بشار حدثنا محمد بن جعفر حدثنا شعبة عن قتادة قال سمعت
قال رسول الله ﷺ ما من نبي إلا وقد أنذر أمته الأعور الكذاب ألا إنه أعور وإن ربكم ليس بأعور مكتوب بين عينيه ك ف ر هذا حديث حسن صحيح
Its chain of transmission is agreed upon (by Bukhari and Muslim). Muslim, in the Book of Tribulations, chapter on the mention of Dajjal, hadith no. 2933, narrated it from Muhammad bin Bashshar, and Bukhari, hadith no. 7131, narrated it from the hadith of Shubah, with the same wording.