Title: al-Farq bayna al-ḍād wa-al-ẓāʼ fī kitāb Allāh ʻAzza wa-Jall wa-fī al-mashhūr min al-kalām
Subjects: Arabic language, Terms and phrases, Early works to 1800, Ḍād (The Arabic letter), Ẓāʼ (The Arabic letter), Orthography and spelling, Language, style, Qurʼan