Kitábu'l-Asmáʼ

The Kitábu'l-Asmáʼ (Arabic: کتاب الأسماء; Book of Divine Names), also known as the Chahár Shaʻn (Persian: چهار شأن; The [Book of the] Four Grades) is a book written by the Báb, the founder of Bábi religion, in Arabic during his imprisonment in Máh-Kú and Chihriq in Iran (1847–1850). With a total volume of more than 3,000 pages, it is the largest revealed scripture in religious history. Stephen Lambden describes the Kitábu'l-Asmáʼ as "one of the most theologically weighty or important writings of the Bab".

At least twenty-six manuscripts exist, and much of the text has not yet been located. Some extracts are available in English in the volume Selections from the Writings of the Báb.