Hadith.4554 - Zur'ah narrated from Sama'ah, who said: I asked him about two men who jointly owned a bondwoman and married her to another man. Then, one of the two owners purchased the other's share. Imam (as) said: "She becomes prohibited for him by his purchase of her, because buying her is equivalent to divorcing her, unless he purchases her completely."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.4555 - Ismail ibn Abi Ziyad narrated from Imam Jafar ibn Muhammad Al-Sadiq (as) from his father, Imam Muhammad ibn Ali Al-Baqir (as), from his forefathers (peace be upon them) that the Messenger of Allah (swt) (peace and blessings be upon him and his family) said: "Any free woman who marries herself to a slave without the permission of his masters has made her private parts permissible unlawfully, and she is not entitled to a dowry."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.