The unique contract is a book written by Ibn Abd Rabbo Al -Andalusi, which is considered one of the mothers of the book of Arabic literature. The book includes a number of news, proverbs, wisdom, sermons, poems, and others. It was called the "contract" because Ibn Abd Rabbo divided it into chapters or books that carried each of them the name of a generous stone, such as Zabarjeda, Al -Mugrouna, Ruby, Jumana, Pearl, and other things that dealt with the real charity contracts. The book is a literary encyclopedia, which combines poetic and prose selections, glimpses of history and news, taking into account views of rhetoric and criticism with a bit of performances and music, and signals of morals and customs.