Abu Sa’id al-Khudri reported: The Messenger of Allah, peace and blessings be upon him, said, “The False Messiah will come and he will be forbidden from entering the boundary of Medina. He will descend upon some of the salty barren areas around Medina. On that day, a man among the best of the people will say come out and say: I testify that you are the same impostor whom the Messenger of Allah, peace and blessings be upon him, told us about. The False Messiah will say: Do you all think if I killed you and brought you back to life, would you have any doubt in the matter? The man will say no. Then, he will kill the man and bring him back to life and the man will say when he is alive again: By Allah, I have never seen so clearly as I do today! The False Messiah will intend to kill him, for he has not authority over him.”
Source: Ṣaḥīḥ al-Bukhārī 6713
Grade: Sahih (authentic) according to Al-Bukhari
عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ يَأْتِي الدَّجَّالُ وَهُوَ مُحَرَّمٌ عَلَيْهِ أَنْ يَدْخُلَ نِقَابَ الْمَدِينَةِ فَيَنْزِلُ بَعْضَ السِّبَاخِ الَّتِي تَلِي الْمَدِينَةَ فَيَخْرُجُ إِلَيْهِ يَوْمَئِذٍ رَجُلٌ وَهُوَ خَيْرُ النَّاسِ أَوْ مِنْ خِيَارِ النَّاسِ فَيَقُولُ أَشْهَدُ أَنَّكَ الدَّجَّالُ الَّذِي حَدَّثَنَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ حَدِيثَهُ فَيَقُولُ الدَّجَّالُ أَرَأَيْتُمْ إِنْ قَتَلْتُ هَذَا ثُمَّ أَحْيَيْتُهُ هَلْ تَشُكُّونَ فِي الْأَمْرِ فَيَقُولُونَ لَا فَيَقْتُلُهُ ثُمَّ يُحْيِيهِ فَيَقُولُ وَاللَّهِ مَا كُنْتُ فِيكَ أَشَدَّ بَصِيرَةً مِنِّي الْيَوْمَ فَيُرِيدُ الدَّجَّالُ أَنْ يَقْتُلَهُ فَلَا يُسَلَّطُ عَلَيْهِ
6713 صحيح البخاري كتاب الفتن باب لا يدخل الدجال المدينة