What is the reward for a woman who marries a man who is mentally ill without her knowledge of his illness, and she patiently endures the difficulty of living with him?

Whoever is afflicted in this world with something that causes them a miserable life and hardship will receive great good and reward from Allah if they are patient and seek recompense, for calamities expiate sins and elevate ranks. Associating with a spouse of this type carries a great reward because it is one of the most difficult matters. And life itself is all a trial and test. The Sharia (definition) has given the spouses the option to annul the marriage if one of them has a repellent defect, such as insanity, unless that defect was accepted.