Sahih al-Bukhari 6183
صحيح البخاري#6183Sahihحَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " وَيَقُولُونَ الْكَرْمُ، إِنَّمَا الْكَرْمُ قَلْبُ الْمُؤْمِنِ ".
Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "They say Al-Karm (the generous), and in fact Al-Karm is the heart of a believer
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: 78:207