Sahih al-Bukhari 1334
صحيح البخاري#1334SahihNarrated Jabir:The Prophet (ﷺ) offered the funeral prayer of As-Hama An-Najash and said four Takbir
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: 23:89