Mafteah ha-Tokhahot · מפתח התוכחות

A commentary on the fifth book of the Torah, Mishneh Torah (Deuteronomy), the fifth of the keys its author wrote on the five books, composed, it says, not to set out the plain sense of the commandments but to rouse the reader to a few matters from the secrets of the Torah and the reasons of the commandments. It explains its name at the opening: he called it the Key of the Reproofs because Moses began the book with reproofs and ended with them. It follows the portions from Eleh ha-Devarim to Ve-Zot ha-Berakhah, dwells on prophecy longer than on anything else in it, and ends by joining the first verse of the Torah to its last. Having finished the fifth book and with it the whole Pentateuch, it closes with what it calls a thread, petil, on which to hang all five keys, handed to the seven companions who, it says, were the cause of the work; the five books, it adds, were written by the way of the ten sefirot, and it has abridged the way that cannot be written down but only passed on by mouth.