Tartib al-Musnad is the principal hadith collection of the Ibadi branch of Islam. It has one thousand and five individual hadiths, some of which are also found in Sunni hadiths. The collection is not used outside Ibadism. It is a "musnad", that is to say, a collection of hadiths organized into parts according to which narrator is the source of each hadith. (Other collections are generally organized into parts according to the subject of the hadiths.) The work is divided into four parts: The 263 hadith of parts three and four are those added by Abu Yaqub's work.