In this specialized academic study, Dr. Wael Al-Harbi delves into the linguistic phenomenon of 'Source-Based Commentary' (Al-Ta'qib Al-Masdari) and its significance within the Holy Quran. The book provides a comprehensive analysis of this rhetorical device, exploring its grammatical structure and semantic purposes across various Quranic contexts. Al-Harbi examines how this stylistic feature contributes to the depth, eloquence, and inimitability of the Quranic text. This work is an essential resource for researchers and students of Quranic studies, Arabic linguistics, and rhetoric, offering profound insights into the intricate miracles of the Quran's language.