Sahih al-Bukhari 6261
صحيح البخاري#6261SahihNarrated Abu Hurairah (ra):Allah's Messenger (ﷺ) mentioned a person from Bani Israel who took a piece of wood, made a hole in it, and put therein one thousand Dinar and letter from him to his friend. The Prophet (ﷺ) said, "(That man) cut a piece of wood and put the money inside it and wrote a letter from such and such a person to such and such a person
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: 79:35