This work is an explanatory text for ibn al-Muʿṭī's poem, al-Durra al-alfiyya, that summarizes all the grammatical rules in a poetic form. The explanation was originally written by al-Nīlī for educati This work is an explanatory text for ibn al-Muʿṭī's poem, al-Durra al-alfiyya, that summarizes all the grammatical rules in a poetic form. The explanation was originally written by al-Nīlī for educational purposes as a response to the request of some of his students. His explanation is characterized by its moderation, avoidance of redundancies and deficient brevity. The author also committed in his work to the original order of the poem.