'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 (RA) with a slight variation of wording.
Hadith Referenceصحيح مسلم / كتاب الألفاظ من الأدب وغيرها / 2250
Abu Umama bin Sahl bin Hunaif, on the authority of his father, reported Allah's Messenger (ﷺ) as saying: None of you should say: "My soul has become evil," but he should say: "My soul has become remorseless."
Hadith Referenceصحيح مسلم / كتاب الألفاظ من الأدب وغيرها / 2251