Rawḥ ibn ʿAbd al-Muʾmin related to us; Yazīd ibn Zurayʿ related to us; Saʿīd transmitted from Qatādah regarding Allah’s words, “By the Mount, and by a Book inscribed” (al-Ṭūr 52:2). He said, “al-mastūr means al-maktūb—the written.” Concerning the verse, “in parchment unrolled” (al-Ṭūr 52:3), he said, “That is the Book.”