Abu Sufyan said, "Heraclius sent for me when I was in 'llya' (i.e. Jerusalem). Then he asked for the letter of Messenger of Allah ﷺ and when he had finished its reading there was a great hue and cry around him and the voices grew louder and we were asked to quit the place. When we were turned out, I said to my companions, 'The cause of Ibn Abi Kabsha has become conspicuous as the King of Bani Al- Asfar is afraid of him.' "  

أَخْبَرَهُ أَنَّ هِرَقْلَ أَرْسَلَ إِلَيْهِ وَهُمْ بِإِيلِيَاءَ ثُمَّ دَعَا بِكِتَابِ رَسُولِ اللَّهِ ﷺ فَلَمَّا فَرَغَ مِنْ قِرَاءَةِ الْكِتَابِ كَثُرَ عِنْدَهُ الصَّخَبُ فَارْتَفَعَتِ الأَصْوَاتُ وَأُخْرِجْنَا فَقُلْتُ لأَصْحَابِي حِينَ أُخْرِجْنَا لَقَدْ أَمِرَ أَمْرُ ابْنِ أَبِي كَبْشَةَ إِنَّهُ يَخَافُهُ مَلِكُ بَنِي الأَصْفَرِ