The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship
حَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمِ بْنِ مَيْمُونٍ، حَدَّثَنَا ابْنُ مَهْدِيٍّ، عَنْ مُعَاوِيَةَ بْنِ صَالِحٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ جُبَيْرِ بْنِ نُفَيْرٍ، عَنْ أَبِيهِ، عَنِ النَّوَّاسِ بْنِ سَمْعَانَ الأَنْصَارِيِّ، قَالَ سَأَلْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم عَنِ الْبِرِّ وَالإِثْمِ فَقَالَ " الْبِرُّ حُسْنُ الْخُلُقِ وَالإِثْمُ مَا حَاكَ فِي صَدْرِكَ وَكَرِهْتَ أَنْ يَطَّلِعَ عَلَيْهِ النَّاسُ " .Nawwas b. Sam'an al-Ansari reported:I asked Allah's Messenger (ﷺ) about virtue and vice. He said: Virtue is a kind disposition and vice is what rankles in your heart and that you disapprove that people should come to know of it
From Sahih Muslim, whose reports the scholars accept as authentic.