Saeed bin Musayyib said that Sayyiduna Umar bin Khattab, may Allah be pleased with him, said that if a man marries a woman and she has insanity, leprosy, or vitiligo, and the husband, not knowing this, has intercourse with her, the woman is entitled to the full dowry from the husband, and he may take it back from her guardian.

Imam Malik, may Allah have mercy on him, said: The guardian will have to return the dowry in the case when he is the woman's father or brother or such a close relative who knows the condition of the woman, and if the guardian is not a close relative, such as a paternal cousin, or a freed slave, or any other family member who does not know the condition of the woman, then it will not be obligatory for him to return the dowry; rather, the dowry will be taken back from the woman, except for the amount by which her private parts became lawful.