Sahih al-Bukhari 2692
صحيح البخاري#2692SahihNarrated Um Kulthum bint `Uqba:That she heard Allah's Messenger (ﷺ) saying, "He who makes peace between the people by inventing good information or saying good things, is not a liar
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 53:3