Yahya related to me from Malik that he had heard that Said ibnal-Musayyab said that if a man married a woman, and he was insane orhad a physical defect, she had the right of choice. If she wished shecould stay, and if she wished she could separate from him. (IT)
USC-MSA web (English) reference: Book 29, Hadith 28 (IT)
Arabic reference (IT): Book 29, Hadith 1185 (IT)