Sahih al-Bukhari 1881
صحيح البخاري#1881Sahihحَدَّثَنَا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ، حَدَّثَنَا الْوَلِيدُ، حَدَّثَنَا أَبُو عَمْرٍو، حَدَّثَنَا إِسْحَاقُ، حَدَّثَنِي أَنَسُ بْنُ مَالِكٍ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لَيْسَ مِنْ بَلَدٍ إِلاَّ سَيَطَؤُهُ الدَّجَّالُ، إِلاَّ مَكَّةَ وَالْمَدِينَةَ، لَيْسَ لَهُ مِنْ نِقَابِهَا نَقْبٌ إِلاَّ عَلَيْهِ الْمَلاَئِكَةُ صَافِّينَ، يَحْرُسُونَهَا، ثُمَّ تَرْجُفُ الْمَدِينَةُ بِأَهْلِهَا ثَلاَثَ رَجَفَاتٍ، فَيُخْرِجُ اللَّهُ كُلَّ كَافِرٍ وَمُنَافِقٍ ".
Narrated Anas bin Malik:The Prophet (ﷺ) said, "There will be no town which Ad-Dajjal will not enter except Mecca and Medina, and there will be no entrance (road) (of both Mecca and Medina) but the angels will be standing in rows guarding it against him, and then Medina will shake with its inhabitants thrice (i.e. three earthquakes will take place) and Allah will expel all the non-believers and the hypocrites from it
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 29:15