Sahih al-Bukhari 6183
Book 78: Good Manners and Form (Al-Adab) · Narrated by Abu Huraira
Arabic
حَدَّثَنَا 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 ".
English translation
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
Reference: Sahih al-Bukhari 6183, Book of Good Manners and Form (Al-Adab). English translation by Dr. Muhammad Muhsin Khan.