Matthew 16:6
And Jesus said to them, Observe and beware of the leaven of the Pharisees and Sadducees.
Luke 12:1
AT that time, the multitude being assembled by ten thousands, so that they trod one on another, he said to his disciples, Beware, first, of the leaven of the Pharisees, which is hypocrisy;
Mark 8:15
And he charged them, saying, Observe and beware of the leaven of the Pharisees, and of the leaven of Herod.
1 Corinthians 5:6-8
Your rejoicing is not good. Do you not know that a little leaven leavens the whole mass?
Galatians 5:9
A little leaven leavens the whole mass.
Matthew 16:12
Then they understood that he did not tell them to beware of the leaven of bread, but of the teaching of the Pharisees and Sadducees.
Luke 12:15
And he said to them, See, and beware of all covetousness; for one's life depends not on the abundance of his property.
2 Timothy 2:16-17
But profane and vain words, avoid; for they greatly increase impiety,