August 27

It is clear from a study of the Text that infallibility is an essential attribute of the Manifestation of God. Bahá’u’lláh wrote: “…the Most Great Infallibility is confined to the One Whose station is immeasurably exalted beyond ordinances or prohibitions and is sanctified from errors and omission…Were He to pronounce right to be wrong or denial to be belief, He speaketh the truth as bidden by God. This is a station wherein sins or trespasses neither exist nor are mentioned.” (Tablets of Bahá’u’lláh Revealed after the Kitáb-i-Aqdas) 
- The Universal House of Justice  (From a letter dated 26 November 1986 to a National Spiritual Assembly; ‘Messages from the Universal House of Justice 1986-2001’)