Qaf (surah) in the context of "Muqattaʿat"

The mysterious letters (muqaṭṭaʿāt, Arabic: حُرُوف مُقَطَّعَات ḥurūf muqaṭṭaʿāt, "disjoined letters" or "disconnected letters") are combinations of between one and five Arabic letters that appear at the beginning of 29 out of the 114 chapters (surahs) of the Quran just after the Bismillāh Islamic phrase. The letters are also known as fawātiḥ (فَوَاتِح) or "openers" as they form the opening verse of their respective surahs.

Four (or five) chapters are named for their muqaṭṭaʿāt: Ṭā-Hā, Yā-Sīn, Ṣād, Qāf, and sometimes Nūn.