
“There should be neither harming nor reciprocating harm.”
Abu Saíd Saád bin Malik bin Sinan Al-Khudri in The Sunnah and the Science of Hadith by Imam Yahia bin Sharaful-Deen An-Nawawi http://www.wisdom.edu.ph/Sunnah/3FortyHadith.html Hadith 32
Shi'ite Hadith