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.
Source: sunnah.com
Other translations
Arabic
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 صلى الله عليه وسلم يَقُولُ : " إِنَّهُ لَمْ يَكُنْ نَبِيٌّ بَعْدَ نُوحٍ إِلاَّ وَقَدْ أَنْذَرَ الدَّجَّالَ قَوْمَهُ، وَإِنِّي أُنْذِرُكُمُوهُ " . فَوَصَفَهُ لَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم وَقَالَ : " لَعَلَّهُ سَيُدْرِكُهُ مَنْ قَدْ رَآنِي وَسَمِعَ كَلاَمِي " . قَالُوا : يَا رَسُولَ اللَّهِ كَيْفَ قُلُوبُنَا يَوْمَئِذٍ أَمِثْلُهَا الْيَوْمَ قَالَ : " أَوْ خَيْرٌ " .
sunnah.com