Baha'u'llah admits to have supplied women to Subh-i-Azal

Once We [Baha'u'llah] had entered Iraq and a number of days passed, We were joined by My brother [Subh-i-Azal], and he remained with Us for a period of months that hath been mentioned in Tablets. He sought from Us a wife; We procured for him what quelled his carnal desire, and he dwelled comfortably in the land.

Though We sent for believing women to be dispatched from other lands to appear before thee, whereafter thou didst enjoy intimacy with them and abide in conspicuous comfort, ...

Although, moreover, thou didst seek from Me what would gratify thy passion, till eventually thou didst gather around thyself a number of maidens and sustain thyself with them, ...

O My brother! How many a night didst thou repose on thy bed with thy wives while I personally protected thee, ...

(Baha'u'llah, Lawh-i-Mirza Rida-Quli)

https://adibmasumian.com/translations/lawh-i-mirza-rida-quli/

And Moojan Momen (Scholar loyal to the Baha'i UHJ) states:

Mírzá Yahyá is reputed to have been an uxorious man. His own son Ridvan-`Ali reports him to have had eleven or twelve wives while another source gives fourteen wives.

(The Cyprus Exiles)

https://bahai-library.com/momen_cyprus_exiles