With the repreieve provided by the Treaty of Hudaybiyya, Prophet Muhammad can focus on spreading Islam by doing dawah to surrounding leaders. This lecture covers encounters with two prominent leaders:1. The Abysinnian king Najashi, who converted to Islam2. The Roman emperor Heraclius, who questioned Abu Sufyan and acertained Prophet Muhammad's legitimacy, but did not openly convertLecture notes available at http://www.why-quran.org/?p=624.Subscribe at http://www.why-quran.org/subscribe to watch the lectures live and participate in the Q&A at the end of each class.Video recording of this lecture + Q&A available on YouTube at https://www.youtube.com/watch?v=FqptIDOW2fU&list=PLpkB0iwLgfTat-Pgh4W3WFmupPamiC9UT.