Achmed ibn Yahya was the cousin of Tariq ibn Rashid and the Inkeeper of Star of Allah inn in the Street of David.
Once he promised Tariq to bring him a relic of Saint Tariq from his pilgrimage but failed to do so. As a punishment, Tariq was angry and would not sell him a broom for no price. Achmed offered a good amount of money but still, his inn was overcome with filth and could not open it for anyone.
He told that story to Arthur after he ate the apple of truth. Arthur bought a broom for him and Achmed allowed him to sleep for a night.