The Kitáb-i-Aqdas
178.Call ye to mind the shaykh whose name was Muḥammad-Ḥasan   ¶166
Shaykh Muḥammad-Ḥasan, one of the leading exponents of Shí‘ih Islám, rejected the Báb. The author of voluminous writings on Shí‘ih jurisprudence, he is reported to have died around 1850.
Nabíl, in The Dawn-Breakers, describes the encounter that took place in Najaf between Mullá ‘Alíy-i-Bastámí, one of the Letters of the Living, and Shaykh Muḥammad-Ḥasan. During the meeting, Mullá ‘Alá announced the manifestation of the Báb and extolled the potency of His Revelation. At the instigation of the shaykh, Mullá ‘Alá was forthwith pronounced a heretic and expelled from the assembly. He was put on trial, transported to Istanbul, and condemned to hard labour.1
1 Shoghi Effendi, The Dawn-Breakers, p. 90