'White washed' in the Bible

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

Then Paul said to him, “God is going to strike you, you whitewashed wall! Do you sit to try me according to the Law, and in violation of the Law order me to be struck?”