Matthew 16:6

And Jesus said to them, "Look out, and keep on guarding yourselves against the yeast of the Pharisees and the Sadducees!"

Luke 12:1

Meanwhile as the people had gathered in tens of thousands, so that they were trampling upon one another, He began to say, first of all, to His disciples: "Beware of the yeast of the Pharisees, that is, hypocrisy.

Mark 8:15

Then He kept warning them by saying, "Look out! Keep on guarding yourselves against the yeast of the Pharisees and the yeast of Herod."

1 Corinthians 5:6-8

Your ground for boasting about such a case is not good. Are you not aware that a little yeast will change the whole lump of dough?

Galatians 5:9

A little yeast will transform the whole dough.

Matthew 16:12

Then they understood that He meant, guard yourselves not against yeast for bread, but against the teaching of the Pharisees and the Sadducees.

Luke 12:15

And then He said to them, "Be ever on the alert and always on your guard against every form of greed, because a man's life does not consist in his possessions, even though they are abundant."

2 Timothy 2:16-17

Continue shunning worldly, futile phrases, for they lead on to greater depths of godlessness,

Treasury of Scripture Knowledge

Summary

Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees.

General references

Bible References

The leaven

Matthew 16:12
Then they understood that He meant, guard yourselves not against yeast for bread, but against the teaching of the Pharisees and the Sadducees.
Mark 8:15
Then He kept warning them by saying, "Look out! Keep on guarding yourselves against the yeast of the Pharisees and the yeast of Herod."
Luke 12:1
Meanwhile as the people had gathered in tens of thousands, so that they were trampling upon one another, He began to say, first of all, to His disciples: "Beware of the yeast of the Pharisees, that is, hypocrisy.
1 Corinthians 5:6
Your ground for boasting about such a case is not good. Are you not aware that a little yeast will change the whole lump of dough?
Galatians 5:9
A little yeast will transform the whole dough.
2 Timothy 2:16
Continue shunning worldly, futile phrases, for they lead on to greater depths of godlessness,

General references

John 4:33
So the disciples began to say to one another, "Nobody has brought Him anything to eat, has he?"