Sahih al-Bukhari 7216
صحيح البخاري#7216Sahihحَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا سُفْيَانُ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، سَمِعْتُ جَابِرًا، قَالَ جَاءَ أَعْرَابِيٌّ إِلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ بَايِعْنِي عَلَى الإِسْلاَمِ. فَبَايَعَهُ عَلَى الإِسْلاَمِ، ثُمَّ جَاءَ الْغَدَ مَحْمُومًا فَقَالَ أَقِلْنِي. فَأَبَى، فَلَمَّا وَلَّى قَالَ " الْمَدِينَةُ كَالْكِيرِ، تَنْفِي خَبَثَهَا، وَيَنْصَعُ طِيبُهَا ".
Narrated Jabir:A bedouin came to the Prophet (ﷺ) and said, "Please take my Pledge of allegiance for Islam." So the Prophet took from him the Pledge of allegiance for Islam. He came the next day with a fever and said to the Prophet (ﷺ) "Cancel my pledge." But the Prophet (ﷺ) refused and when the bedouin went away, the Prophet said, "Medina is like a pair of bellows (furnace): It expels its impurities and brightens and clears its good
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: 93:76