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that Heraclius had sent for him to come along with a group of the Quraish who were trading in Sha'm, and they came to him. Then Abu Sufyan mentioned the whole narration and said, "Heraclius asked for the letter of Allah's Messenger (ﷺ) . W

The Prophet (ﷺ) wrote a letter to Heraclius: "From Muhammad, the Messenger of Allah, to Hiraql (Heraclius), Chief of the Byzantines. Peace be to those who follow the guidance." Ibn Yahya reported on the authority of Ibn Abbas that AbuSufyan

'Abdullah ibn 'Abbas related that Abu Sufyan ibn Harb sent him to Heraclius, the Byzantine Emperor, and he called for the letter of the Messenger of Allah which Dihya had brought to the governor of Busra, who in turn passed it on to Heracli