Is it permissible to withhold an employee's wages for the days she worked due to her breach of the agreed-upon contract, knowing that she caused damage to the work?

So long as the employee left work before the end of the agreed-upon period, you are not obligated to give her anything. However, it is preferable to pay the wages for the days she worked, as this is more cautious, absolves one of responsibility, and avoids the disagreement of those who made it obligatory to pay wages for the days worked.