[Machine] He informed him that the Messenger of Allah wrote to Caesar, inviting him to Islam, and sent his letter with Dihyah al-Kalbi. The Messenger of Allah commanded him to deliver it to 'Azim Busr to deliver it to Caesar. 'Azim Busr delivered it to Caesar. When Allah revealed his victory over the Persian army, Caesar walked from Hims to Iliya in gratitude to Allah. When the letter of the Messenger of Allah reached Caesar, he said when he read it, "Is there anyone from his people here who can ask him about the Messenger of Allah?"  

أَخْبَرَهُ أَنَّ رَسُولَ اللهِ ﷺ كَتَبَ إِلَى قَيْصَرَ يَدْعُوهُ إِلَى الْإِسْلَامِ وَبَعَثَ بِكِتَابِهِ مَعَ دِحْيَةَ الْكَلْبِيِّ وَأَمَرَهُ رَسُولُ اللهِ ﷺ أَنْ يَدْفَعَهُ إِلَى عَظِيمِ بُصْرَى لِيَدْفَعَهُ إِلَى قَيْصَرَ فَدَفَعَهُ عَظِيمُ بُصْرَى إِلَى قَيْصَرَ وَكَانَ قَيْصَرُ لَمَّا كَشَفَ اللهُ عَنْهُ جُنُودَ فَارِسَ مَشَى مِنْ حِمْصَ إِلَى إِيلِيَاءَ شُكْرًا لَمَّا أَبْلَاهُ اللهُ فَلَمَّا جَاءَ قَيْصَرَ كِتَابُ رَسُولِ اللهِ ﷺ قَالَ حِينَ قَرَأَهُ «الْتَمِسُوا هَلْ هَاهُنَا مِنْ قَوْمِهِ مِنْ أَحَدٍ لِيَسْأَلَهُ عَنْ رَسُولِ اللهِ ﷺ؟ » مُخْتَصَرٌ  

[Machine] About the book of the Messenger of Allah ﷺ to Kisra, Ibn Shihab reported that Ubaidullah ibn Abdullah informed him that Abdullah ibn Abbas informed him that the Messenger of Allah ﷺ sent his book to Kisra and ordered him to deliver it to the ruler of Bahrain. So, the ruler of Bahrain delivered it to Kisra, but when Kisra read it, he tore it apart.  

عَنْ كِتَابِ رَسُولِ اللهِ ﷺ إِلَى كِسْرَى قَالَ ابْنُ شِهَابٍ أَخْبَرَنِي عُبَيْدُ اللهِ بْنِ عَبْدِ اللهِ أَنَّ عَبْدَ اللهِ بْنَ عَبَّاسٍ أَخْبَرَهُ أَنَّ رَسُولَ اللهِ ﷺ بَعَثَ بِكِتَابِهِ إِلَى كِسْرَى وَأَمَرَهُ أَنْ يَدْفَعَهُ إِلَى عَظِيمِ الْبَحْرَيْنِ فَدَفَعَهُ عَظِيمُ الْبَحْرَيْنِ إِلَى كِسْرَى فَلَمَّا قَرَأَهُ كِسْرَى مَزَّقَهُ  

"Before he died, the Messenger of Allah ﷺ had written to Kisra, Ceasar, An-Najashi, and to every tyrant calling them to Allah. This An-Najashi is not the one that the Prophet ﷺ performed to the funeral Salat for." (Using translation from Tirmidhī 2716)  

أَنَّ رَسُولَ اللهِ ﷺ كَتَبَ قَبْلَ مَوْتِهِ إِلَى كِسْرَى وَإِلَى قَيْصَرَ وَإِلَى النَّجَاشِيِّ وَإِلَى كُلِّ جُبَارٍ يَدْعُوهُمْ إِلَى اللهِ تَعَالَى لَيْسَ النَّجَاشِيُّ الَّذِي صَلَّى عَلَيْهِ رَسُولُ اللهِ ﷺ  

"The Messenger of Allah [SAW] wanted to write to the Romans, but they (the Companions) said: 'They do not read any letter unless it has a seal.' So he took a ring of silver, and it is as if I can see its whiteness on his hand, and on it were engraved (the words): "Muhammad Rasul Allah (Muhammad the Messenger of Allah)." (Using translation from Nasāʾī 5201)  

أَرَادَ رَسُولُ اللهِ ﷺ أَنْ يَكْتُبَ كِتَابًا إِلَى الرُّومِ فَقَالُوا «إِنَّهُمْ لَا يَقْرَءُونَ كِتَابًا إِلَّا مَخْتُومًا فَاتَّخَذَ خَاتَمًا مِنْ فِضَّةٍ كَأَنِّي أَنْظُرُ إِلَى بَيَاضِهِ فِي يَدِهِ وَنَقَشَ فِيهِ مُحَمَّدٌ رَسُولُ اللهِ»