The project has two main objectives. The first is an eddition of Kitab al-wara (The Book of Scrupulous Piety) compiled by ‘Abd al-Malik ibn Habib (d. 238/853), a treatise which is one of the oldest sources coming from Muslim Spain (al-Andalus). The other objective is a study of the phenomenon of scrupulous piety in Islam in the 3rd/9th century, taking into account the edited source in question and in the end producing a monograph devoted to this important phenomenon, which has been neglected in the existing literature.