that a man asked the Messenger of Allah ﷺ, "What is Īmān (faith)?" He said, "If you are happy with your good deeds and are saddened by your bad deeds, then you are a believer." The man said, “O Messenger of Allah, then what is sin?” He said, "If something ˹you do˺ troubles you within, then you should abandon it." (Using translation from Aḥmad 22166)
سَمِعْتُ أَبَا أُمَامَةَ يَقُولُ سَأَلَ رَجُلٌ النَّبِيَّ ﷺ فَقَالَ مَا الْإِثْمُ؟ فَقَالَ إِذَا حَكَّ فِي نَفْسِكَ شَيْءٌ فَدَعْهُ قَالَ فَمَا الْإِيمَانُ؟ قَالَ إِذَا سَاءَتْكَ سَيِّئَتُكَ وَسَرَّتْكَ حَسَنَتُكَ فَأَنْتَ مُؤْمِنٌ