Anas ibn Malik reported: The Messenger of Allah, peace and blessings be upon him, said, “No prophet was sent but that he warned his nation of the one-eyed liar. Verily, he is blind in one eye while your Lord is not, and between his two eyes is written the word of unbelief.”
Source: Ṣaḥīḥ al-Bukhārī 7131, Ṣaḥīḥ Muslim 2933
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَا بُعِثَ نَبِيٌّ إِلَّا أَنْذَرَ أُمَّتَهُ الْأَعْوَرَ الْكَذَّابَ أَلَا إِنَّهُ أَعْوَرُ وَإِنَّ رَبَّكُمْ لَيْسَ بِأَعْوَرَ وَإِنَّ بَيْنَ عَيْنَيْهِ مَكْتُوبٌ كَافِرٌ
7131 صحيح البخاري كتاب الفتن باب ذكر الدجال
2933 صحيح مسلم كتاب الفتن وأشراط الساعة باب ذكر الدجال وصفته وما معه