 Complete the following phrase:  Upon the Conquest of Mecca in January 630, Utbah and his brother Muattib withdrew to the edge of Mecca with the other polytheists. Muhammad asked his uncle al-Abbas to bring them to him. They were brought, and at Muhammads invitation, they converted to Islam and took the oath of allegiance. Al-Abbas remarked that Muhammads face was reflecting joy at their conversion. Utbah joined the Islamic army and fought at 