I heard the Prophet ﷺ say: There has been no Prophet after Noah who has not warned his people about the antichrist (Dajjal), and I warn you of him. The Messenger of Allah ﷺ described him to us, saying: Perhaps some who have seen me and heard my words will live till his time. The people asked: Messenger of Allah! what will be the condition of our hearts on that day? Like what we are today? He replied: Or better.
سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ إِنَّهُ لَمْ يَكُنْ نَبِيٌّ بَعْدَ نُوحٍ إِلاَّ وَقَدْ أَنْذَرَ الدَّجَّالَ قَوْمَهُ وَإِنِّي أُنْذِرُكُمُوهُ فَوَصَفَهُ لَنَا رَسُولُ اللَّهِ ﷺ وَقَالَ لَعَلَّهُ سَيُدْرِكُهُ مَنْ قَدْ رَآنِي وَسَمِعَ كَلاَمِي قَالُوا يَا رَسُولَ اللَّهِ كَيْفَ قُلُوبُنَا يَوْمَئِذٍ أَمِثْلُهَا الْيَوْمَ قَالَ أَوْ خَيْرٌ