Kitáb-i-Íqán
The Kitáb-i-Íqán (Persian: كتاب ايقان, Arabic: كتاب الإيقان, lit. 'Book of Certitude'; from the Arabic íqán, "to know with certitude"), also known as the Book of Íqán or simply The Íqán, is a book by Baháʼu'lláh, the founder of the Baháʼí Faith, and the principal doctrinal work of that religion. Composed in Baghdad over the course of two days and nights in January 1861, partly in Persian and partly in Arabic, the work was written in response to a series of questions posed by Ḥájí Mírzá Siyyid Muḥammad, a maternal uncle of the Báb, concerning the signs of the appearance of the promised one of Islam.