'White washed' in the Bible

"How terrible it will be for you, scribes and Pharisees, you hypocrites! You are like whitewashed tombs that look beautiful on the outside but inside are full of dead people's bones and every kind of impurity.

At this Paul told him, "God will strike you, you whitewashed wall! How can you sit there and judge me according to the Law, and yet in violation of the Law order me to be struck?"