al-Kashaaf by az-Zamakhshari - Ibn al-Uthaymeen رحمه الله

This audio is taken from his explanation of the book: مقدمة التفسير لابن تيمية
al-Kashaaf is a book in tafseer and well known for its benefits related to the Arabic language, however its author was Mu'tazili. Ibn Al Uthaymeen رحمه الله brings an example showing how subtle the author established his work upon his Mu'tazili belief and how a person can be affected if he isn't well grounded.
For that reason, studying the foundations firstly and studying correctly without jumping to books or issues above a person's level can misguide him.