Narrated [Ibn 'Abbas (RA)]:

Allah's Messenger (ﷺ) said: "There should neither be harming (of others without cause), nor reciprocating harm (between two parties)." [Reported by Ahmad and Ibn Majah].

وَعَنْ اِبْنِ عَبَّاسٍ ‏-رَضِيَ اَللَّهُ عَنْهُمَا‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ لَا ضَرَرَ وَلَا ضِرَارَ } رَوَاهُ أَحْمَدُ, وَابْنُ مَاجَهْ [1]‏ .‏