…Shaykh Ahmad bade him [Siyyid Kázim] farewell, urged him to
face valiantly the trials that must needs afflict him, and committed him to the
care of God. [Shaykh Ahmad went to Mecca] In Karbilá, Siyyid Kázim devoted
himself to the work initiated by his master, expounded his teachings, defended
his Cause, and answered whatever questions perplexed the minds of his
disciples.
(Chapter 1, ‘The Dawn-Breakers’)