(On) April 29, 1863, the ninth day of Ridvan, the flooding Tigris receded enough so that Baha’u’llah’s family could cross the river and join him on the island. This symbol – the reunification and strength of the bond of family, and by extension the unity of the entire human family – permeates the meaning of the ninth day of Ridvan. Link
"When the news (of Baha’u’llah’s exile) came to us, from which we inferred that my father would again be made a prisoner, we were thrown into consternation, fearing another separation. He was summoned before the magistrates…. Great numbers of his followers had assembled before our house, and these witnessed his departure with many demonstrations of grief, feeling that it was possible he might not return.
The magistrates expressed great sorrow to my father; they said that they respected and loved him, that they had not instigated the order (the exile order had come from the Sultan of Turkey), but that they were powerless to suspend or modify it, and must proceed with its execution."
--Bahiyyih Khanum, daughter of Baha'u'llah