God never wastes words. When He gave additional commands after speaking and writing the Ten Commandments, all of His instructions were for a reason and a purpose. Even those that don’t apply today had a purpose for the time they were given. Some repeated aspects of the Ten Commandments. Even if these statutes or ordinances are not binding today, the higher law can never be abrogated.
When we pray for healing and then choose lifestyle habits that make us sick, we are praying presumptuous prayers.