August 17

…the Qayyúm-i-Asmá, His [The Báb’s] celebrated commentary on the Súrih of Joseph, revealed in the first year of His Mission, and characterized by Bahá’u’lláh as “the first, the greatest, and mightiest of all books” in the Bábí Dispensation… 
- Shoghi Effendi  (‘The Promised Day Is Come’)