Galatians 5:9
A little yeast grows through the whole lump.
1 Corinthians 15:33
Do not be deceived. "Evil companionships corrupt good morals."
Matthew 16:6-12
Jesus said to them, "Take heed and beware of the yeast of the Pharisees and Sadducees."
Matthew 23:33
You serpents, you offspring of vipers, how will you escape the judgment of hell?
Mark 8:15
He warned them, saying, "Take heed: beware of the yeast of the Pharisees and the yeast of Herod."
Luke 12:1
Meanwhile, when a crowd of many thousands had gathered together, so much so that they trampled on each other, he began to tell his disciples first of all, "Beware of the yeast of the Pharisees, which is hypocrisy.
Luke 13:21
It is like yeast, which a woman took and hid in three measures of flour, until it was all leavened."
1 Corinthians 5:6-7
Your boasting is not good. Do you not know that a little yeast leavens the whole lump?
2 Timothy 2:17
and their word will consume like gangrene, of whom is Hymenaeus and Philetus;