'White washed' in the Bible

“Woe to you, scribes and Pharisees, hypocrites! You are like whitewashed tombs, which appear beautiful on the outside, but inside are full of dead men’s bones and every impurity.

Then Paul said to him, “God is going to strike you, you whitewashed wall! You are sitting there judging me according to the law, and in violation of the law are you ordering me to be struck?”