6 “Be careful,” Jesus said to them. “Be on your guard against the yeast of the Pharisees and Sadducees.”

Read Matthew 16:6 Using Other Translations

Then Jesus said unto them,Take heed and beware of the leaven of the Pharisees and of the Sadducees.
Jesus said to them, "Watch and beware of the leaven of the Pharisees and Sadducees."
“Watch out!” Jesus warned them. “Beware of the yeast of the Pharisees and Sadducees.”