Some Covenant-breakers

I reached 'Akká by night, and went to the hospice, where I found Hájí 'Abbás. He was an Arab from Baghdad, and became a Covenant-breaker in the end. Hájí 'Abbás had been in Beirut, heading for 'Akká, and I had said to him, "Don't tell anyone in 'Akká that Ustád Muḥammad-'Alí is coming."

Jamal-i-Burujerdi, this man was an important Bahá'í teacher during Bahá'u'lláh's lifetime. But, afterward, he rebelled against 'Abdu'l-Bahá's authority and became one of the most implacable of Covenant-breakers. See God Passes By, pp. 247-48; Stories from The Delight of Hearts, pp. 128-29, 135-43 passim; The Revelation of Bahá'u'lláh, Vol. 2, p. 119-19, 264-67.

This Siyyid Mihdiy-i Dahijí broke the Covenant after the passing of Bahá'u'lláh and became known as Takhtih-Kanah-sí [Bedbug] because of his stubborn personality. Ismu'lláhu'l-Mihdí (The Name of God, the Guide] is a title which was conferred on the siyyid by Bahá'u'lláh. See The Revelation of Bahá'u'lláh, Vol. 2, pp. 272-75.

(My Memories of Baha'u'llah by Kalimat Press, Muhammad-'Aliy-i Salmani - 2001)