Sahih al-Bukhari 6058
صحيح البخاري#6058SahihNarrated Abu Huraira:The Prophet (ﷺ) said, "The worst people in the Sight of Allah on the Day of Resurrection will be the double faced people who appear to some people with one face and to other people with another face
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: 78:88