Narrated AbuUbaydah ibn al-Jarrah:

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.

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، عَنْ خَالِدٍ الْحَذَّاءِ، عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ، عَنْ عَبْدِ اللَّهِ بْنِ سُرَاقَةَ، عَنْ أَبِي عُبَيْدَةَ بْنِ الْجَرَّاحِ، قَالَ 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 " .