Lawh-i-Ahmad or Tablet of Ahmad is a tablet written by Bahá'u'lláh, founder of the Bahá'í Faith in Adrianople in 1865. In a letter written on his behalf, Shoghi Effendi has stated that it has been 'invested by Bahá'u'lláh with a special potency and significance'.
References
Tablet of Ahmad (Arabic) Wikipedia(Text) CC BY-SA