وَٱلطُّورِ
Wat-Toor
By the mountain,
By the mount,
Every other mention of al-Tur falls inside the account of Musa at the mountain and the covenant taken there: 2:63, 2:93, 4:154, 19:52, 20:80, 28:29 and 28:46. Here alone it is sworn by, with no word about which mountain is meant. The oath then moves to an inscribed book on open parchment and to a house of worship, so a surah that will later answer charges of soothsaying opens on the sites of an older revelation.