القواعد الأربع (مطبوع ضمن مؤلفات الشيخ مجمد بن عبد الوهاب، الجزء الأول)
al-Qawāʿid al-Arbaʿ by Muḥammad ibn ʿAbd al-Wahhāb is a concise treatise on Islamic creed, focusing on the principles of tawḥīd and the dangers of shirk. It outlines four key principles derived from the Qurʾān to guide Muslims in maintaining pure monotheistic worship.