Romans 3:20

3:20 For no one is declared righteous before him by the works of the law, for through the law comes the knowledge of sin.

Romans 3:27-28

3:27 Where, then, is boasting? It is excluded! By what principle? Of works? No, but by the principle of faith! 3:28 For we consider that a person is declared righteous by faith apart from the works of the law.