Jesus Warns Against The Leaven of the Pharisees

When there were gathered together an innumerable multitude of people, insomuch that they trod one upon another, Jesus began to say unto His disciples, first of all, Beware of the leaven of the Pharisees, which is hypocrisy. For there is nothing covered, that shall not be revealed; neither hid, that shall not be known. Therefore whatsoever you have spoken in darkness shall be heard in the light, and that which you have spoken in the ear in closets shall be proclaimed upon the housetops. Luke 12 vs 1-3.