'White washed' in the Bible

"Woe to you, scribes and Pharisees--hypocrites!--because you are like whitewashed tombs which on the outside appear beautiful, but on the inside are full of the bones of the dead and of everything unclean!

Then Paul said to him, "God is going to strike you, [you] whitewashed wall! And are you sitting [there] judging me according to the law, and acting contrary to the law do you order me to be struck?"