This study deals with the use of Qur'anic Arabic grammar by the authors of the Hawashi Sibawayh book. The Qur'anic concepts of grammar are the basis for the origin of the Arabic language and play a pivotal role in verifying and documenting it. The Holy Quran is the closest linguistic text in the Arabic language, hence, the main reason for the emergence of grammatical studies. It is feared by Muslim scholars that the wrong pronunciation of Qur'anic verses can lead to a critical misinterpretation of Qur'anic concepts and change the judgments derived from them. Therefore, scholars have now turned to studying the language, narrating the poems, and classifying the linguistic material in the Holy Qur'an and adjusting its texts and correcting its readings. In this study, we try to highlight the use of the Qur'anic grammar by the first scholars and indicate their interest in employing it. It was found that the authors of the Hawashi Sibawayh employ a large number of Qur'anic verses to prove the grammatical rules and sometimes cite poetic evidence and then document it. They have adopted the division of the Sibawayh, so they do not deviate from its classifications, however, some authors of the book disagree with Sibawayh in the permissibility of kindness in conjunction with two factors, and employed the Qur'anic evidence to show the frequent omission of the verb of saying in the Holy Qur'an. The study also proves that Abu Bakr al-Sarraj authorized the distinction to be one or plural, as the distinctive was not a number. Abu Ali al-Farsi employed Qur'anic evidence to prove the validity of Sibawayh's argument that (or), be in the sense of (and). This research is an important study as it highlights the use of Qur'anic grammatical evidence in the books of leading Arabic scholars.
Keywords: recruitment, evidence, grammar, Qur'an, language