Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
malik:29-31Mālik > Balaghah > Saʿīd b. al-Musayyab

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.  

مالك:٢٩-٣١وَحَدَّثَنِي عَنْ مَالِكٍ أَنَّهُ بَلَغَهُ عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ

أَنَّهُ قَالَ أَيُّمَا رَجُلٍ تَزَوَّجَ امْرَأَةً وَبِهِ جُنُونٌ أَوْ ضَرَرٌ فَإِنَّهَا تُخَيَّرُ فَإِنْ شَاءَتْ قَرَّتْ وَإِنْ شَاءَتْ فَارَقَتْ