Matthew 16:6, 11-12

“Watch out!” Jesus warned them. “Beware of the yeast of the Pharisees and Sadducees.”

Why can’t you understand that I’m not talking about bread? So again I say, ‘Beware of the yeast of the Pharisees and Sadducees.’” Then at last they understood that he wasn’t speaking about the yeast in bread, but about the deceptive teaching of the Pharisees and Sadducees.