Hadith 10:564
Abu Bakr narrated to us, he said: Abu Usama narrated to us, from Juwaybir, from al-Dahhak, who said: Whoever marries his male slave to a slave woman with the dowry of his daughter, it is not permissible for him to take her away from him, and her private parts are not lawful for him until he dies.
حدثنا أبو بكر قال نا أبو أسامة عن جويبر عن الضحاك قال من زوج عبده أمة بمهر بنته لا يصلح له أن ينزعها منه ولا يحل له فرجها حتى يموت