Matthew 16:6

And Jesus said to them, See and beware of the leaven of the Pharisees and Sadducees.

Luke 12:1

In those times, the myriads of the crowd being gathered together, so that they trod one on another, he began to say to his disciples first, Beware of the leaven of the Pharisees, which is hypocrisy;

Mark 8:15

And he charged them, saying, Take heed, beware of the leaven of the Pharisees and of the leaven of Herod.

1 Corinthians 5:6-8

Your boasting is not good. Do ye not know that a little leaven leavens the whole lump?

Galatians 5:9

A little leaven leavens the whole lump.

Exodus 12:15-19

Seven days shall ye eat unleavened bread: on the very first day ye shall put away leaven out of your houses; for whoever eateth leavened bread from the first day until the seventh day that soul shall be cut off from Israel.

Leviticus 2:11

No oblation which ye shall present to Jehovah shall be made with leaven; for no leaven and no honey shall ye burn in any fire-offering to Jehovah.

Matthew 16:12

Then they comprehended that he did not speak of being beware of the leaven of bread, but of the doctrine of the Pharisees and Sadducees.

Luke 12:15

And he said to them, Take heed and keep yourselves from all covetousness, for it is not because a man is in abundance that his life is in his possessions.

2 Timothy 2:16-17

But profane, vain babblings shun, for they will advance to greater impiety,

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 comprehended that he did not speak of being beware of the leaven of bread, but of the doctrine of the Pharisees and Sadducees.
Exodus 12:15
Seven days shall ye eat unleavened bread: on the very first day ye shall put away leaven out of your houses; for whoever eateth leavened bread from the first day until the seventh day that soul shall be cut off from Israel.
Leviticus 2:11
No oblation which ye shall present to Jehovah shall be made with leaven; for no leaven and no honey shall ye burn in any fire-offering to Jehovah.
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 those times, the myriads of the crowd being gathered together, so that they trod one on another, he began to say to his disciples first, Beware of the leaven of the Pharisees, which is hypocrisy;
1 Corinthians 5:6
Your boasting is not good. Do ye not know that a little leaven leavens the whole lump?
Galatians 5:9
A little leaven leavens the whole lump.
2 Timothy 2:16
But profane, vain babblings shun, for they will advance to greater impiety,

General references

Exodus 13:7
Unleavened bread shall be eaten the seven days; and leavened bread shall not be seen with thee, neither shall there be leaven seen with thee in all thy borders.
Proverbs 19:27
Cease, my son, to hear the instruction which causeth to stray from the words of knowledge.
John 4:33
The disciples therefore said to one another, Has any one brought him anything to eat?