The Prophet ﷺ said: Let him who hears of the Dajjal (Antichrist) go far from him for I swear by Allah that a man will come to him thinking he is a believer and follow him because of confused ideas roused in him by him.
قَالَ رَسُولُ اللَّهِ ﷺ مَنْ سَمِعَ بِالدَّجَّالِ فَلْيَنْأَ عَنْهُ فَوَاللَّهِ إِنَّ الرَّجُلَ لَيَأْتِيهِ وَهْوَ يَحْسِبُ أَنَّهُ مُؤْمِنٌ فَيَتَّبِعُهُ مِمَّا يُبْعَثُ بِهِ مِنَ الشُّبُهَاتِ أَوْ لِمَا يُبْعَثُ بِهِ مِنَ الشُّبُهَاتِ هَكَذَا قَالَ