This book deals with an explanation: "The Board of Al -Taqreeb" by Imam Al -Nawawi, where the compiler plays and explains an adequate explanation for every word, language, convention ... etc. And it started in the sense of the correct, its sections, and whoever classified it, then talked about the good and the weak. Then he offered the rest of the hadith sections in various rationale, until he reached sixty -five species. This book is an explanation of the book: "The Board of Right" in particular, then for the abbreviation of Ibn Al -Salah and all other books of art in general.