[Machine] Imam Shafi'i, may Allah have mercy on him, said: When the Persian king, Kisra, received the letter from the Prophet ﷺ, he tore it apart. The Messenger of Allah ﷺ said: "His kingdom has been torn apart, and we have preserved that Caesar honored the letter of the Prophet ﷺ and placed it in a musk (scented) bag." The Prophet ﷺ said: "Strengthen his kingdom."
قَالَ الشَّافِعِيُّ رَحِمَهُ اللهُ وَلَمَّا أُتِيَ كِسْرَى بِكِتَابِ النَّبِيِّ ﷺ مَزَّقَهُ فَقَالَ رَسُولُ اللهِ ﷺ تَمَزَّقَ مُلْكُهُ وَحَفِظْنَا أَنَّ قَيْصَرَ أَكْرَمَ كِتَابَ النَّبِيِّ ﷺ وَوَضَعَهُ فِي مِسْكٍ فَقَالَ النَّبِيُّ ﷺ ثُبِّتَ مُلْكُهُ