Explanation of forty nuclear pocket size

Muhammad bin Ali bin Wahb al-Qushairi

The nuclear forty has the right to be explained by the scholars, to be memorized by students, to be mastered by scholars, and to be asked about what is in it among the general public, as it almost collects all the knowledge of religion. This is one of the first explanations on which it was based, and it is a brief, comprehensive, and adequate explanation, not too long and boring, nor too abbreviated.