Jami` at-Tirmidhi 3920
جامع الترمذي#3920Sahihحَدَّثَنَا الأَنْصَارِيُّ، قَالَ حَدَّثَنَا مَعْنٌ، قَالَ حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، وَحَدَّثَنَا قُتَيْبَةُ، عَنْ مَالِكِ بْنِ أَنَسٍ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، عَنْ جَابِرٍ، أَنَّ أَعْرَابِيًّا، بَايَعَ رَسُولَ اللَّهِ صلى الله عليه وسلم عَلَى الإِسْلاَمِ فَأَصَابَهُ وَعَكٌ بِالْمَدِينَةِ فَجَاءَ الأَعْرَابِيُّ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ أَقِلْنِي بَيْعَتِي . فَأَبَى رَسُولُ اللَّهِ صلى الله عليه وسلم فَخَرَجَ الأَعْرَابِيُّ ثُمَّ جَاءَهُ فَقَالَ أَقِلْنِي بَيْعَتِي . فَأَبَى فَخَرَجَ الأَعْرَابِيُّ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّمَا الْمَدِينَةُ كَالْكِيرِ تَنْفِي خَبَثَهَا وَتُنَصِّعُ طَيِّبَهَا " . وَفِي الْبَابِ عَنْ أَبِي هُرَيْرَةَ .هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
Narrated Jabir:that a Bedouin gave the pledge to the Messenger of Allah (ﷺ) for Islam, then he was afflicted by the sickness in Al-Madinah. So the Bedouin went to the Messenger of Allah (ﷺ) and said: "Take back my pledge." But the Messenger of Allah (ﷺ) refused. Then the Bedouin left and came back and said: "Take back my pledge," and he refused. Then the Messenger of Allah (ﷺ) said: "Al-Madinah is but like bellows, it expels its filth and purifies 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:
In-book reference: 49:320