Matthew 16:1, 6, 12
Matthew 16:1 NIV
The Pharisees and Sadducees came to Jesus and tested him by asking him to show them a sign from heaven.
Matthew 16:6 NIV
“Be careful,” Jesus said to them. “Be on your guard against the yeast of the Pharisees and Sadducees.”
Matthew 16:12 NIV
Then they understood that he was not telling them to guard against the yeast used in bread, but against the teaching of the Pharisees and Sadducees.