(40) باب فِي الْغِيبَةِ
Narrated AbuHurayrah:
The Prophet (ﷺ) said: The gravest sin is going to lengths in talking unjustly against a Muslim's honour, and it is a major sin to abuse twice for abusing once. (RU)
Reference (RU): Sunan Abi Dawud 4877 (RU)
In-book reference (RU): Book 43, Hadith 105 (RU)
English translation (RU): Book 42, Hadith 4859 (RU)