Sahih Bukhari Volume 009, Book 091, Hadith Number 369.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 91. Accepting Information given by a Truthful Person
Narrated By 'Abdullah bin 'Abbas : Allah's Apostle 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 Apostle invoked Allah to tear them (Khosrau and his followers) into pieces."