Aishah reported the Prophet ﷺ as saying: None of you should say Ja’shat nafsi (My heart is being agitated), but one should say Laqisat nafsi (My heart is being annoyed).
Benefits and Issues: Islam, along with purifying the beliefs and actions of its followers, has also refined the style and expressions of their language and idioms. The Divine command is: (Evil is the name of wickedness after faith) (: al-Hujurat: 11). After embracing faith, the name of wickedness is very evil.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 4979
Umm al-Mu'mineen Sayyidah Aisha (may Allah be pleased with her) narrates that the Noble Prophet (peace and blessings be upon him) said: "No person should say, 'My soul has become impure,' rather he should say, 'I am feeling tired.'"
Shaykh Muhammad Ibrahim bin Basheer
Benefit: It is understood that a person should choose such words for himself that are not contrary to his dignity. The apparent meaning of the word "khabīth" (impure) and the word "nafs" (self) is the same, but the word "khabīth" and its apparent meaning were against human dignity; therefore, the use of this word for oneself was prohibited. (Fath al-Bari: 10/692)
Source: Musnad al-Humaydi: Commentary by Muhammad Ibrahim bin Bashir, Page: 264