Volume 8, Book 74, Number 277:
Narrated Abu Sufyan bin Harb:
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 Apostle . When the letter was read, its contents were as follows: ‘In the
name of Allah, the Beneficent, the Merciful. From Muhammad, Allah’s slave and His Apostle to Her –
aclius, the Chief of Byzantines: Peace be upon him who follows the right path (guidance)! Amma
ba’du (to proceed )…’ (See Hadith No 6, Vol 1 for details)