Sahih al-Bukhari 7264
صحيح البخاري#7264SahihNarrated `Abdullah bin `Abbas:Allah's Messenger (ﷺ) sent a letter to Khosrau and told his messenger to give it first to the ruler of Bahrain, and tell him to deliver it to Khosrau. When Khosrau had read it, he tore it into pieces. (Az-Zuhri said: I think Ibn Al-Musaiyab said, "Allah's Messenger (ﷺ) invoked Allah to tear them (Khosrau and his followers) into pieces
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: 95:18