Once Messenger of Allah ﷺ gave a letter to a person and ordered him to go and deliver it to the Governor of Bahrain. (He did so) and the Governor of Bahrain sent it to Chousroes, who read that letter and then tore it to pieces. (The sub-narrator (Ibn Shihab) thinks that Ibn Al-Musaiyab said that Messenger of Allah ﷺ invoked Allah against them (saying), "May Allah tear them into pieces, and disperse them all totally.)" (Using translation from Bukhārī 64)
أَخْبَرَهُ أَنَّ النَّبِيَّ ﷺ بَعَثَ بِكِتَابِهِ إِلَى كِسْرَى مَعَ رَجُلٍ وَأَمَرَهُ أَنْ يَدْفَعَهُ إِلَى عَظِيمِ الْبَحْرَيْنِ فَدَفَعَهُ عَظِيمُ الْبَحْرَيْنِ إِلَى كِسْرَى فَلَمَّا قَرَأَهُ خَرَقَهُ قَالَ فَحَسِبْتُ أَنَّ ابْنَ الْمُسَيِّبِ قَالَ فَدَعَا عَلَيْهِمْ رَسُولُ اللهِ ﷺ أَنْ يُمَزَّقُوا كُلَّ مُمَزَّقٍ