Hadith #32 (The Forty Hadith of Imam Nawawi)
Book: No harm and no reciprocation of harm
Narrator(s): Abu Sa'eed al-Khudree
Grade: Hasan

There should be neither harming (darar) nor reciprocating harm (dirar).

Source: https://parallelquran.com/hadith/forty-nawawi-32/

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Hadith #34 (The Forty Hadith of Imam Nawawi)
Book: Changing evil with the hand, tongue, or heart
Narrator(s): Abu Sa'eed al-Khudree
Grade: Sahih

I heard the Messenger of Allah (ﷺ) say, “Whosoever of you sees an evil, let him change it with his hand; and if he is not able to do so, then [let him change it] with his tongue; and if he is not able to do so, then with his heart — and that is the weakest of faith.”

Source: https://parallelquran.com/hadith/forty-nawawi-34/