In a small bowl or cup, combine oregano, salt and pepper.
Rub mixture into chicken. Melt the butter in a large skillet over medium heat.
Add chicken and cook for 3 to 5 minutes per side. Transfer to a slow cooker.
In the same skillet, add water, lemon juice and garlic.
Bring mixture to a boil then pour over the chicken in the slow cooker.
Cover and cook on LOW for 6 hours.
Add the parsley to the slow cooker during the last 15 to 30 minutes of cooking time.
Serve and enjoy!