Kitāb al-Muʾmin

Hadith 173
backbiting-slandermockery-ridicule
173 - وعن أبي عبد الله عليه السلام قال: قال النبي صلى الله عليه و آله وسلم: من أذاع فاحشة كان كمبتدئها، ومن عير مؤمنا بشئ لم يمت حتى يركبه.
173. It has been reported that Abu 'Abd Allah (a.s) said: The Prophet (a.s) said: One who spreads an indecency is like the one who started it; and one who dishonors a believer of something will not die until he perpetrates it himself.
Source: Ḥusayn b. Saʿīd al-Ahwāzī