Matthew 16:12
Then they understood that He did not say to beware of the leaven of the (bread) of the Pharisees and Sadducees, but of the teaching of the Pharisees and Sadducees.
Luke 12:1
In the meantime, myriads of the multitude having gathered together, So that they trode on one another, He began to speak to His disciples first; Take heed unto yourselves from the leaven of the Pharisees, which is hypocrisy.
Acts 12:3
And seeing that it is pleasing to the Jews, he proceeded to arrest Peter also: and those were the days of the unleavened bread:
1 Corinthians 5:7-8
Cleanse away the old leaven, in order that you may be a new lump, as you are free from leaven; for Christ has truly become our Passover.
Galatians 5:12
I would that those troubling you shall indeed cut themselves off.