Ibrahim al-Nakha'i (may Allah have mercy on him) said: "If a slave marries with his master's permission, then the right of divorce is in the hands of the slave. And if he marries without permission and the master comes to know of this marriage, then if he rejects it, separation will be made between the slave and his wife. And whatever the master receives from his wife's dowry will be returned to the master, and whatever the woman has already used will become her property. If someone has deceived the woman, then the equivalent dowry will be obligatory upon him."