Sahih al-Bukhari 3744
صحيح البخاري#3744SahihNarrated Anas bin Malik:Allah's Messenger (ﷺ) said, " Every nation has an extremely trustworthy man, and the trustworthy man of this (i.e. Muslim) nation is Abu 'Ubaida bin Al-Jarrah
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: 62:89