Galatians 5:9
A little leaven leavens the whole lump.
1 Corinthians 15:33
Be not deceived: evil companions corrupt good morals.
Matthew 16:6-12
Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees.
Matthew 23:33
You serpents, you generation of vipers, how can you escape the judgment of hell?
Mark 8:15
And he charged them, saying, Take heed, beware of the leaven of the Pharisees, and of the leaven of Herod.
Luke 12:1
In the meantime, when there were gathered together an innumerable multitude of people, so much that they tread one upon another, he began to say unto his disciples first of all, Beware of the leaven of the Pharisees, which is hypocrisy.
Luke 13:21
It is like leaven, which a woman took and hid in three measures of meal, till the whole was leavened.
1 Corinthians 5:6-7
Your glorying is not good. Know you not that a little leaven leavens the whole lump?
2 Timothy 2:17
And their word will eat as does a canker: of whom is Hymenaeus and Philetus;