The Kitáb-i-Aqdas
190.O source of perversion!   ¶184
This is a reference to Mírzá Yaḥyá, known as Ṣubḥ-i-Azal (Morning of Eternity), a younger half-brother of Bahá’u’lláh, who arose against Him and opposed His Cause. Mírzá Yaḥyá was nominated by the Báb to serve as a figure-head for the Bábi community pending the imminent manifestation of the Promised One. At the instigation of Siyyid Muḥammad-i-Isfahání (see note 192), Mírzá Yaḥyá betrayed the trust of the Báb, claimed to be His successor, and intrigued against Bahá’u’lláh, even attempting to have Him murdered. When Bahá’u’lláh formally declared His Mission to him in Adrianople, Mírzá Yaḥyá responded by going to the length of putting forward his own claim to be the recipient of an independent Revelation. His pretensions were eventually rejected by all but a few, who became known as Azalís (see note 177). He is described by Shoghi Effendi as the “Arch-Breaker of the Covenant of the Báb” (see God Passes By, chapter X).
Mírzá Yaḥyá (Ṣubḥ-i-Azal),   17, n177, n191-n192
assurance of forgiveness should he repent,   K184, 163
followers of,   n177
Muḥammad-i-Isfahání, Siyyid,   K184, 164, n192
Source of perversion,   K184
Other Related References
Shoghi Effendi
God Passes By,   pp. 112-115, 163-182