Talking about these unknown letters that are specific to the number of their letters with repetition, and the number of their letters without repetition, and their sentences in the surahs, and their individual parts in Saqwa and Waun, and their duplication in Tatu and Taha and its sisters, and their plurals from three onwards until they reached five continuous and separate letters, and they did not reach more, nor did some of them connect and break. Some of them, while the surahs were not in the sīn and were not in the ṣād, and why the meaning of these letters was not known among the apparent scholars and when revealing the people of circumstances, etc. of what we mentioned in the book of collection and detail in knowing the meanings of the revelation, let us say, with God’s blessing, and God speaks the truth and He guides the path.