Muhammad.com collection in 109 languages

Heraclius next asked if they had ever fought against the Prophet (salla Allahu alihi was
sallam) and if so to tell him about the outcome. Abu Sufyan replied that they had fought;
sometimes they had been victorious and upon other occasions victory belonged to the
Prophet (salla Allahu alihi wa sallam).

Then Heraclius inquired about his teachings whereupon Abu Sufyan told him that the
Prophet (salla Allahu alihi was sallam) ordered his followers to worship Allah alone and
not to associate anything or anyone with Him, and to renounce the idols their forefathers
had worshipped. Abu Sufyan continued to tell him that the Prophet (salla Allahu alihi was
sallam) also ordered them to pray, not to lie, to be chaste, and to foster kindred
relationships.

The Witnessing to the Authenticity of Prophet Muhammad, (salla Allahu alihi wa sallam)

From these answers Heraclius confirmed his opinion of the Prophet (salla Allahu alihi
was sallam) saying, "All the prophets came from noble families, I asked you if anyone
before him from your tribe claimed to be a prophet and your reply was no. If your reply
had affirmed it then I would have deduced he was mimicking that man. I asked if any of