'White washed' in the Bible

'Woe to you, Scribes and Pharisees, hypocrites! because ye are like to whitewashed sepulchres, which outwardly indeed do appear beautiful, and within are full of bones of dead men, and of all uncleanness;

then Paul said unto him, 'God is about to smite thee, thou whitewashed wall, and thou -- thou dost sit judging me according to the law, and, violating law, dost order me to be smitten!'