Wikipedia
The Kitáb-i-Aqdas or Aqdas is the central book of the Bahá'í Faith written by Bahá'u'lláh, the founder of the religion, 1853-1873. It has the same status as the Quran for Muslims or the Bible for Christians. The work was written in Arabic under the Arabic title , but it is commonly referred to by its Persian title, Kitáb-i-Aqdas , which was given to the work by Bahá'u'lláh himself. It is sometimes also referred to as "the Most Holy Book", "the Book of Laws" or the Book of Aqdas. The word Aqdas has a significance in many languages as the superlative form of a word with its primary letters Q-D-Š.
It is usually stated that the book was completed around 1873, although there is evidence to suggest that at least some of the work was written earlier. Bahá'u'lláh had manuscript copies sent to Bahá'ís in Iran some years after the revelation of the Kitáb-i-Aqdas, and in 1890–91 (1308 AH, 47 BE) he arranged for the publication of the original Arabic text of the book in Bombay, India.
The Aqdas is referred to as "the Mother-Book" of the Bahá'í teachings, and the "Charter of the future world civilization". It is not, however, only a 'book of laws': much of the content deals with other matters, notably ethical exhortations and addresses to various individuals, groups, and places. The Aqdas also discusses the establishment of Bahá'í administrative institutions, Bahá'í religious practices, mysticism, laws of personal status, criminal law, spiritual and ethical exhortations, social principles, miscellaneous laws and abrogations, and prophecies.