Khadijih Khanum's family belonged to the Namadsab tribe. Members of this tribe occupied areas in close proximity to Takur in the district of Núr in Mazandaran where Bahá'u'lláh's father and paternal ancestors came from. It is not known who Khadijih Khanum's parents were or whether she had any siblings. There is also no information available about Khadijih Khanum's childhood or early life. All aspects of her life before she married Mirza Buzurg, Bahá'u'lláh's father, remain unexplored. The date and place of her birth are also unknown. She was likely born in one of the villages in the vicinity of the village of Takur.
Following the traditional pattern, Khadijih Khanum married probably very young to a certain Aqa Sultan. He died sometime after the birth of their third child. They had two daughters and one son and were probably residing in Tihran. Sometime after his death, Khadijih Khanum married Mirza Buzurg.
Khadijih Khanum’s family had preexisting ties to the family of Mirza Buzurg since an older sister of Mirza Buzurg was already married into the family. It is estimated that their wedding took place between 1810 and 1812. They had five children. The first-born of that marriage was a daughter, Sarih Khanum: she is generally known as 'Ukht’, Arabic for sister, because Baha’u’llah has thus referred to her. The next was a son, Mirza Mihdi, who died in his father's lifetime. Bahá'u'lláh was their third-born. The fourth was another son, Mirza Musa, entitled Aqay-i-Kalim in later years, and the fifth was another daughter, Nisa Khanum, who was married to Mirza Majid-i-Ahi, a secretary of the Russian Legation. It was the Custom of the family to spend the winter months in Tehran, where Mirza Buzurg would attend to his government duties, and the summer in the family home in Takur. It is not clear exactly when Khadijih Khanum passed away and where she has been buried.
When Khadijih Khanum passed away, Bahá'u'lláh revealed a visitation prayer in her honour. The prayer bears no date and there is no indication as to where it was revealed. Here is a provisional translation approved by the Baha’i World Center:
The most honoured, esteemed and respected mother.
He is God!
Praised be Thou O Lord, My God! This is My mother who hath
acknowledged Thy oneness, confessed Thy unity, attained the honour of meeting
Thy Manifestations in Thy days, reached the station of recognition and entered
the tabernacle of Heaven, for she loved Thyself and Thy Servant and held fast
to the cord of Thy love through the sanctified Temples of Thy Sovereignty.
I beseech Thee, therefore, O My God, to grant her the honour of beholding Thy Beauty, and vouchsafe unto her the gift of Thy Presence. Give her to drink then from the ocean of Thy mercy and the chalice of Thy forgiveness. Make her to dwell, O My God, in the precincts of Thy mercy in the Heaven of eternity. Grant her to hear Thy holy melodies that she may cast the veil from her head in her eagerness to meet Thee and speed through the domains of Thy nearness and union.
Thou art verily powerful over all that Thou desirest, and Thou art verily the Mighty, the Most Luminous.
(Adapted from ‘Leaves of the Twin Divine Trees’, by Baharieh Rouhani-Ma’ani, ‘Baha’u’llah, A Short Biography’, by Moojan Momen, and ‘Baha’u’llah, The King of Glory’, by H.M. Baluzi)