Materials for the history of the text of the Qurʾān the old codices ; the Kitāb al-maṣāḥif of Ibn Abī Dawūd, together with a collection of the variant readings from the codices of Ibn Maʿsūd, Ubai, ʿAlī, Ibn ʿAbbās, Anas, Abū Mūsā and other early Qurʾānic authorities which present a type of text anterior to that of the canonical text of ʻUthmān = Kitāb al-maṣāḥif : nuqal min nusḫa ḫaṭṭīya waḥīda maḥfuẓa fi 'l-maktaba aẓ-ẓāhirīya bi-Dimašq