(12) باب فِي الصُّلْحِ
Narrated AbuHurayrah:
The Prophet (ﷺ) said: Conciliation between Muslims is permissible. The narrator Ahmad added in his version: "except the conciliation which makes lawful unlawful and unlawful lawful." Sulayman ibn Dawud added: The Messenger of Allah (ﷺ) said: Muslims are on (i.e. stick to) their conditions. (ID)
Reference (ID): Sunan Abi Dawud 3594 (ID)
In-book reference (ID): Book 25, Hadith 24 (ID)
English translation (ID): Book 24, Hadith 3587 (ID)