Tultusceptru de libro domni Metobii is a short Latin biography of Muḥammad written in the 9th or 10th century in the Iberian Peninsula. It is a polemical text designed to show that Islam is a false religion and Muḥammad the unwitting dupe of the devil. It is known from a single copy in the Codex of Roda. Although the codex was compiled in the late 10th century, the Tultusceptru was added between about 1030 and 1060.

The Códice de Roda or Códice de Meyá is a medieval manuscript that represents a unique primary source for details of the 9th- and early 10th-century Kingdom of Navarre and neighbouring principalities. It is currently held in Madrid as Real Academia de la Historia MS 78.