The Yeast of the Pharisees

Luke 12.1-3

Meanwhile, when the crowd gathered in thousands, so that they trampled on one another, he began to speak first to his disciples, ‘Beware of the yeast of the Pharisees, that is, their hypocrisy. Nothing is covered up that will not be uncovered, and nothing secret that will not become known. Therefore whatever you have said in the dark will be heard in the light, and what you have whispered behind closed doors will be proclaimed from the housetops.