This study examines the unknown poetic citations in Mughni Al-Labib, dividing them into four categories: citations with no attribution in Mughni but attributed in earlier grammatical works, citations with no attribution and disputed authorship in earlier grammatical works, citations with no attribution and absent in earlier grammatical works, and citations with disputed textual variations that undermine their validity as evidence. The study adopts a descriptive-analytical methodology to address selected citations, focusing on the approach Ibn Hisham used in selecting these citations. It also analyzes the grammatical and syntactic value of the examples within the framework of grammatical rulings. The research concludes with several findings, the most significant of which is that Ibn Hisham prioritized grammatical rules over the attribution of poetic verses. He assumed that his audience had sufficient knowledge to follow the grammatical rule without needing to focus on the author of the citation. Keywords: Attribution issues, grammatical citations, Ibn Hisham, unknown authorship.