“Recite ye the verses of God every morn and eventide.” (Bahá’u’lláh, ‘The Kitáb-i-Aqdas’)

August 14

Thou hast enquired about the warning We gave to the people at the time of Our departure from ‘Iráq to the effect that when the Sun disappeareth from sight, birds of darkness will be in motion and the standards of Samírí [1] will be reared high. I swear by God! Those birds have stirred in these days and Samírí hath raised his clamour. Well is it with him who recognizeth and is numbered with men of understanding. We have also warned them against the appearance of the calf. God is My witness! All Our warnings have come to pass, as indeed, they are bound to, inasmuch as they have issued from the fingers of glory and might. Beseech thou God to protect thee from the mischief of these men and to purify thee from the insinuations of the froward. Strengthen thy loins then for the promotion of the Cause and pay no attention unto the words uttered by the people of the Bayán, for they are truly incapable of understanding and have failed to comprehend the essence of the Cause as is revealed in this august, this Most Great Announcement. Thus have We inspired thee, and infused into thy heart that which will make thee independent of the allusions of mankind. 
- Baha’u’llah  (‘Tablets of Baha’u’llah revealed after the Kitab-i-Aqdas’)
[1] The maker of the Golden Calf. See Qur’án 20:87–98.