Galatians 5:9
A little leaven, leavens (ferments) the whole lump.
1 Corinthians 15:33
Do not be deceived: Bad company corrupts good morals.
Matthew 16:6-12
Jesus said: Take care to have nothing to do with the leaven of the Pharisees and Sadducees.
Matthew 23:33
You serpents! You offspring of vipers! How will you escape from being destroyed in the ever-burning fires of the Valley of Hinnom? (Greek: Gehenna, the trash fires in the valley just outside of Jerusalem)
Mark 8:15
He ordered them to be aware of the leaven of the Pharisees and the leaven of Herod.
Luke 12:1
Thousands of people in the crowd were gathered together so much that they bumped into one another. He said to his disciples: First of all, beware of the leaven of the Pharisees, which is hypocrisy.
Luke 13:21
It is like this. A woman takes some yeast and mixes it with a bushel of flour. Soon the whole batch of dough rises.
1 Corinthians 5:6-7
Your boasting is not good. Do you know that a little leaven ferments the whole batch of dough?
2 Timothy 2:17
This kind of talk will spread like gangrene. Among them are Hymenaeus and Philetus.