In this important and eloquent book, the author Abd al -Malik bin Abdullah bin Yusuf al -Jawini Abu al -Ma'ali, the Imam of the Two Holy Mosques, tells us about the saying in the sciences, its perceptions and evidence, then it moves to present a number of books divided into chapters, and begins with the first book entitled: The saying in the statement, and the second book entitled: Book Consensus, the third book entitled The Book of Measurement, and the Fourth Book entitled: The Book of Inference, and the Fifth Book entitled The Book of Weights.