It was in this period that Bahá'u'lláh revealed the Seven Valleys (Haft Vadi)in response to a request from a Súfí, Shaykh Muhyi'd-Dín, the Qádí of Khániqayn, whom He may have met in Kurdistán. In it Bahá'u'lláh described the "seven stages which the soul of the seeker must needs traverse ere it can attain the object of its existence." These seven stages were originally proposed by the great Persian Sufi poet Shaykh Faridu'd-Din Attar (d1230C.E) in his renowned work the Mantiqu't-Tayr (The Conference of the Birds.) [BBS94; GPB140; BBD206; BBRSM:64; SA150; BKG161-163; RoB1p98-101]
For details of the composition and content of the Seven Valleys see SA150.