Some years later the Báb was united in wedlock with the sister
of Mírzá Siyyid Hasan and Mírzá Abu’l-Qásim.
(Chapter 3 of ‘The Dawn-Breakers)
According to Hájí Mu’inu’s-Saltanih’s narrative (p. 37), the Báb’s marriage took place when He was twenty-two years of age.
(Footnotes to
chapter 3 of 'The Dawn-Breakers', provided by Shoghi Effendi)