Al-Adab Al-Mufrad, Book 14, Hadith 295 (In-Book) ⓘ

It is reported Nawwas ibn Sam'an asked the Messenger of Allah, may Allah bless him and grant him peace, about dutifulness and wrong action. He said, "Dutifulness is good character and wrong action is that which works on yourself and which you dislike for other people to become aware of."

حَدَّثَنَا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ، قَالَ‏:‏ حَدَّثَنَا مَعْنٌ، عَنْ مُعَاوِيَةَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ جُبَيْرٍ، عَنْ أَبِيهِ، عَنْ نَوَّاسِ بْنِ سَمْعَانَ الأَنْصَارِيِّ، أَنَّهُ سَأَلَ رَسُولَ اللهِ صلى الله عليه وسلم عَنِ الْبِرِّ وَالإِثْمِ‏؟‏ قَالَ‏:‏ الْبِرُّ حُسْنُ الْخُلُقِ، وَالإِثْمُ مَا حَكَّ فِي نَفْسِكَ وَكَرِهْتَ أَنْ يَطَّلِعَ عَلَيْهِ النَّاسُ‏.‏