Hasan (may Allah have mercy on him), Ibrahim Nakha'i (may Allah have mercy on him), and Sha'bi (may Allah have mercy on him) said: "If a slave marries without his master's permission, the matter is in the master's hands; if he wishes, he may let the marriage stand, and if he wishes, he may annul it. And if the marriage was with the master's permission, then divorce is in the slave's authority."
Hadith Referenceسنن سعید بن منصور / كتاب النكاح / 1968
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 790، 791، 795، 802، 803، 805، وعبد الرزاق فى «مصنفه» برقم: 12970، وابن أبى شيبة فى «مصنفه» برقم: 18588»