Kitab al-Jafr

Kitab al-Jafr (Arabic: كِتاب ٱلْجَفْر, romanized: Kitāb al-Jafr) is a mystical book which, in the Shia belief, contains esoteric teachings of the Islamic prophet Muhammad for his cousin and son-in-law Ali, who is recognized as the fourth Rashidun caliph (r. 656–661) and the first Shia Imam. In the Twelver Shia belief, the book was handed down through their line of Twelve Imams, and remains now in the possession of their Hidden Imam, Muhammad al-Mahdi, who would reappear at the end of time to eradicate injustice and evil. In the Sunni lore, the book is instead known as Kitab al-mughaybat (lit. 'the book of hidden things').