A certain Muhammad-Karím who was among the congregation that Friday was likewise attracted by the Báb’s remarkable behaviour on that occasion. What he saw and heard on that day brought about his immediate conversion. Persecution drove him out of Persia to ‘Iráq, where, in the presence of Bahá’u’lláh, he continually deepened his understanding and faith. Later on he was bidden by Him to return to Shíráz and to endeavour to the best of his ability to propagate the Cause. There he remained and laboured to the end of his life.
(Chapter 8, ‘The Dawn-Breakers’)
