(4) باب كَرَاهَةِ قَوْلِ الإِنْسَانِ خَبُثَتْ نَفْسِي
'A'isha reported Allah's Messenger (ﷺ) having said:
None of you should say: "My soul has become evil," but he should say: "My soul has become remorseless." This hadith has been transmitted on the authority of Abu Bakr with a slight variation of wording. (ID)
Reference (ID): Sahih Muslim 2250 a (ID)
In-book reference (ID): Book 40, Hadith 17 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 27, Hadith 5595 (ID)