Abu Sufyan ibn Harb, at the time an adversary to Muhammad but a signatory to the, then recent, Treaty of Hudaybiyyah, was trading in Greater Syria when he was summoned to the court of Heraclius. Asked by Heraclius about the man claiming to be a prophet, Abu Sufyan responded, speaking favorably of Muhammad's character and lineage and outlining some directives of Islam. Heraclius was seemingly impressed by what he was told of Muhammad, and felt that Muhammad's claim to prophethood was valid.[45][47][48] Despite this incident, it seems that Heraclius was more concerned with the current rift between the various Christian churches within his empire, and as a result did not convert to Islam.[45][49]