The commentary of Muḥammad b. Masʿūd al-ʿAyyāshī al-Samarqandī is one of the oldest books of narrative Tafsir. Since Tafsir Ayyashi is one of the first books of narrative Shia interpretations, it has the highest narrative validity. There are two challenging issues: first, eliminating the documents of the book hadiths; then, absence of the second part of this interpretation and only the first part is available, which continues to the end of the Surah Al-Kahf. The narrative Al-Khabar al-Wāḥid with the valid document has authority. The Tafsir Ayyashi's hadiths are Mursal regarding the eliminations of its documents, or at least their authenticity has not been proven, and for this reason, they have no authority. With description, analysis, and critique method, the present study aimed to find solutions for dissolving two challenging problems about Tafsir Ayyashi authenticity, including author authentication, reliance on retrieving documents in recent sources, scholars' trust in the book, thematology, and comparison with the Qur'an.
