The names of God in Islam (or the 99 names of Allah; ) are the names by which Muslims regard God. Among other places, they are described in the Quran and Sunnah. There is, according to hadith, a special group of 99 names, but no enumeration of them. Thus the exact list is not agreed upon, and the names of God (as adjectives, word constructs, or otherwise) exceed a total of 99 in the Quran and Sunnah. According to a hadith narrated by Abdullah ibn Mas'ud, some of the names of God have also been hidden from mankind.