Shafaqna English- Why Quran? Presented: The Life of the Prophet Muhammad (PBUH) | By Sheikh Azhar Nasser, Part 69. With the repreieve provided by the Treaty of Hudaybiyya, Prophet Muhammad (PBUH) can focus on spreading Islam by doing dawah to surrounding leaders. The Roman emperor Heraclius, who questioned Abu Sufyan and acertained Prophet Muhammad’s legitimacy, but did not openly convert. Part of series: The Life of the Prophet Muhammad (PBUH) by Sheikh Azhar Nasserwww.shafaqna.com