Da'ud ibn Zubayr

Da'ud ibn Zubayr was an officer in the armies of the Caliphate and fought many skirmishes on the border with the Bulgars. This experience led to his selection as one of the Muslim emissaries to heathen Bulgar Khan named Telerikh. The purpose was to attempt to convert him to Islam. The leader of the delegation was Jalal ad-Din who was the spokesman of the group. Da'ud ibn Zubayr's role was that of an advisor and so did not speak to the Kahn during the several meetings he held with the Muslims and the Catholic delegation from Rome.

After much proselytizing and debate, the Khan converted to the Muslim faith because of the nature of the Christian heaven and because the Caliphate commanded a stronger empire than the Pope.