Is the rebellion of an unconsummated wife considered a sufficient reason for divorcing her, and what is the legal ruling regarding the amount of dower she is entitled to in this situation, knowing that she wishes to return the money to you and threatens that she will be an unfit wife and will not care about her religious obligations?

If the wife desires divorce and dislikes intimacy, then there is no good in remaining with her, especially if she does not pray; because one who abandons prayer is a disbeliever, and it is not permissible for a disbelieving woman to remain under a Muslim man.

The husband can request Khul' (divorce at the wife's instance, usually in return for compensation) in exchange for the return of the dowry. It is preferable that the matter be settled amicably through mediators. If that is not possible, then separating from her now is easier than separating from her later, and the loss of money is less than the loss of comfort and tranquility. A Muslim should choose his wife well and seek one who is religious and righteous.