The book of explaining the domains of gold in knowing the words of the Arabs is a book in grammar, author of Ibn Hisham Al -Ansari, which is an explanation of the phrases formulated by the author Ibn Hisham himself in his author named: The Delivery of Gold, and it includes the overall grammar sections close to his book Qatar Al -Nada and Bul Echo, printed the book for several times, Among the most famous of the copies were printed by the investigation of Muhammad Muhyiddin Abdel Hamid.