Mark 8:15

At that time Herod the tetrarch heard the news about Jesus,

And Jesus said to them, “Watch out and beware of the leaven of the Pharisees and Sadducees.”

“How is it that you do not understand that I did not speak to you concerning bread? But beware of the leaven of the Pharisees and Sadducees.”

And they *sent their disciples to Him, along with the Herodians, saying, “Teacher, we know that You are truthful and teach the way of God in truth, and defer to no one; for You are not partial to any.

At this time, after so many thousands of the crowd had gathered together that they were trampling on one another, He began saying to His disciples first, “Be on your guard for the leaven of the Pharisees, which is hypocrisy.