Hadith 514340
Chapter 36: Judgements - كتاب الأقضية
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عَمْرِو بْنِ يَحْيَى الْمَازِنِيِّ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ ضَرَرَ وَلاَ ضِرَارَ " .
Yahya related to me from Malik from Amr ibn Yahya al-Mazini from his father that the Messenger of Allah, may Allah bless him and grant him peace, said, "There is no injury nor return of injury."
Reference Muwatta Malik 514340
USC-MSA web (English) reference : Book 36, Hadith 31