Baha'u'llah & the New Era 2006 by -J. Esslemont- 1 Para

Birth and Childhood
'Abbas Effendi, Who afterwards assumed the title of 'Abdu'l-Baha (i.e. Servant of Baha), was the eldest son of Baha'u'llah. He was born in Tihran before midnight on the eve of the 23rd of May, 1844,1 the very same night in which the Bab declared His mission (38:3)

End of Quote

  Baha'u'llah & the New Era 2006
  Citation Source List
: see