Then they understood that he did not tell them to beware of the leaven of bread, but of the teaching of the Pharisees and Sadducees.
For I tell you, unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven.
For the Sadducees say that there is no resurrection, nor angel, nor spirit, but the Pharisees acknowledge them all.
But when he saw many of the Pharisees and Sadducees coming for baptism, he said to them, "You brood of vipers! Who warned you to flee from the wrath to come?
How is it that you fail to understand that I did not speak about bread? Beware of the leaven of the Pharisees and Sadducees."
Your boasting is not good. Do you not know that a little leaven leavens the whole lump?