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."