'White washed' in the Bible

so tell those who plaster it with whitewash, that it will fall! A flooding rain [of judgment] will come, and you, O [great] hailstones, will fall; and a violent wind will tear the wall apart.

“Woe to you, [self-righteous] scribes and Pharisees, hypocrites! For you are like whitewashed tombs which look beautiful on the outside, but inside are full of dead men’s bones and everything unclean.

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