The paper examines the ‘Ibn Mashʿal episode’ in Moroccan history and explodes its myth. The episode was a non-event; there was no Jew involved, let alone his assassination. The story was false propaganda by al-Rashīd designed for rallying popular support behind his newly-established power. Its acceptance was assisted by the prevalent world-view. Two anonymous Englishmen visiting Morocco in the seventeenth century were the first to commit to writing the ‘national myth’, thus giving it its first seal of authority, which was later reinforced by eighteenth- and nineteenth-century Moroccan chroniclers. The mock commemoration of this non-event, by serving as a regular reminder of the redeeming role of the ‘Alawī dynasty, helped to arouse and promote continuing loyalty to the throne. Various distortions have, however, crept into the basic substratum of al-Rashīd's mythical presentation.