Know, verily, that while the radiant dawn breaketh above the horizon of eternal holiness, the satanic secrets and deeds done in the gloom of night shall be laid bare — Bahá’u’lláh
O Children of Fancy! Know, verily, that while the radiant dawn breaketh above the horizon of eternal holiness, the satanic secrets and deeds done in the gloom of night shall be laid bare and manifest before the peoples of the world.

Bahá’u’lláh

The Hidden Words, Part Two (Persian), No. 67

Bahá’í Reference Library