No meat offering, which you shall bring to the LORD, shall be made with leaven: for you shall burn no leaven, nor any honey, in any offering of the LORD made by fire.
How is it that you do not understand that I spoke it not to you concerning bread, that you should beware of the leaven of the Pharisees and of the Sadducees?
But when he saw many of the Pharisees and Sadducees come to his baptism, he said to them, O generation of vipers, who has warned you to flee from the wrath to come?
In the mean time, when there were gathered together an innumerable multitude of people, so that they stepped one on another, he began to say to his disciples first of all, Beware you of the leaven of the Pharisees, which is hypocrisy.