Acts 23:3
Then Paul said to him, 'God will strike you, you whitewashed wall! Are you sitting to judge me according to the Law, and in violation of the Law are you commanding that I be struck?' — Paul's retort compares the high priest to a 'whitewashed wall,' an image evoking Jesus' denunciation of the Pharisees (Matthew 23:27-28). The accusation is that the high priest violates the law he claims to uphold; hypocrisy is the sin.