This work, 'Is'af al-'Ujul' by Abd al-Rahman Al Nabit, is a contemporary commentary on the classic foundational text 'Waraqat al-Usul' by Imam al-Juwaini. The 'Waraqat' is a highly concise treatise on the principles of Islamic jurisprudence (Usul al-Fiqh). This explanation aims to simplify its complex terminology and unpack its dense rulings, making it accessible for modern students. The title, which translates to 'Aiding the Hasty,' perfectly captures the book's purpose of providing a clear and efficient guide to mastering these fundamental principles.