Yahya related to me from Malik that he had heard that Said ibn al-Musayyab said that if a man married a woman, and he was insane or had a physical defect, she had the right of choice. If she wished she could stay, and if she wished she could separate from him.
Muwatta Malik Book 29, Hadith 31
← Previous Hadith Yahya related to me from Malik from Ibn Shihab from Urwa ibn az- Zubayr that a mawla of the tribe of Banu Adi called Zabra told him that she had been the wife of a slave when she was a slave-girl. Then she was set free and she sent a message to Hafsa, the wife of the Prophet, may Allah bless him and grant him peace. Hafsa called her and said, "I will tell you something., but I would prefer that you did not act upon it. You have authority over yourself as long as your husband does not have intercourse with you. If he has intercourse with you, you have no authority at all." Therefore she pronounced her divorce from him three times.

Muwatta Malik Book 29, Hadith 30 Next Hadith → Malik said that if a slave-girl, who was the wife of a slave, was set free before he had consummated the marriage, and she chose herself, then she had no bride-price and it was a pronouncement of divorce. That was what was done among them.

Muwatta Malik Book 29, Hadith 32