Authored by the Abbasid prince and poet Abdullah ibn al-Mu'tazz, 'Fusul al-Tamathil fi Tabashir al-Surur' stands as a foundational work in the field of Arabic literary criticism. The book meticulously categorizes and analyzes various poetic devices and figures of speech (badi'), such as metaphors, similes, and antithesis. Ibn al-Mu'tazz draws upon a vast collection of poetic examples from his contemporaries and predecessors, providing a systematic framework for understanding Arabic rhetoric. This text is not merely a collection but a critical study that has profoundly influenced subsequent literary theory, making it an indispensable resource for scholars of classical Arabic poetry.