(517) بَابُ: كَيْفَ يَكْتُبُ إِلَى أَهْلِ الْكِتَابِ؟
'Abdullah ibn 'Abbas related that Abu Sufyan ibn Harb sent himto Heraclius, the Byzantine Emperor, and he called for the letter of theMessenger of Allah which Dihya had brought to the governor of Busra, whoin turn passed it on to Heraclius. He read it out, saying, 'In the nameof Allah, the Merciful, the Compassionate, from Muhammad, the slave ofAllah and His Messenger, to Heraclius, ruler of the Byzantines. Peace beupon the one who follows guidance. I call you to Islam. If you become Muslim,you will be safe and Allah will double your reward. If you turn away, thenyou incur the wrong action of your subjects. "O People of the Book!Come to a proposition which is the same for us and you (to Hiswords) Bear witness that we are Muslims."(3:
54)'"
Reference: Al-Adab Al-Mufrad 1109
In-book reference: Book 44, Hadith 9
English translation: Book 44, Hadith 1109