Yet one more among those who emigrated and came to settle near Bahá'u'lláh was the bookbinder, Muhammad-Hadi. This noted man was from Isfahan, and as a binder and illuminator of books he had no peer. When he gave himself up to the love of God he was alert on the path and fearless. He abandoned his home and began a dreadful journey, passing with extreme hardship from one country to another until he reached the Holy Land and became a prisoner. He stationed himself by the Holy Threshold, carefully sweeping it and keeping watch. Through his constant efforts, the square in front of Bahá'u'lláh's house was at all times swept, sprinkled and immaculate.
Bahá'u'lláh would often glance at that plot of ground, and then He would smile and say: "Muhammad-Hadi has turned the square in front of this prison into the bridalbower of a palace. He has brought pleasure to all the neighbors and earned their thanks."
Abdu'l-Baha, Memorials of the Faithful, p. 67