His shamelessness and effrontery had waxed so great as to lead him to perpetrate himself, and permit Siyyid Muhammad to repeat after him, an act so odious that Bahá’u’lláh characterized it as “a most grievous betrayal,” inflicting dishonor upon the Báb, and which “overwhelmed all lands with sorrow.
- Shoghi Effendi (‘God Passes By’, chapter 7)