Muwatta Malik, Book 29, Hadith 1185 (In-Book) ⓘ

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.

وَحَدَّثَنِي 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 ‏.‏ قَالَ مَالِكٌ فِي الأَمَةِ تَكُونُ تَحْتَ الْعَبْدِ ثُمَّ تَعْتِقُ قَبْلَ أَنْ يَدْخُلَ بِهَا أَوْ يَمَسَّهَا إِنَّهَا إِنِ اخْتَارَتْ نَفْسَهَا فَلاَ صَدَاقَ لَهَا وَهِيَ تَطْلِيقَةٌ وَذَلِكَ الأَمْرُ عِنْدَنَا ‏.‏