Romans 3:20
Because by the works of the law, no flesh will be justified in his sight; for through the law comes the knowledge of sin.
World English Bible (Public Domain)
In context
Before · Romans 3:18–19
18“There is no fear of God before their eyes.” 19Now we know that whatever things the law says, it speaks to those who are under the law, that every mouth may be closed, and all the world may be brought under the judgment of God.
20Because by the works of the law, no flesh will be justified in his sight; for through the law comes the knowledge of sin.