Matthew 16:6

And Jesus said to them, Take care to have nothing to do with the leaven of the Pharisees and Sadducees.

Luke 12:1

At that time, when thousands of the people had come together, in such numbers that they were crushing one another, he said first to his disciples, Have nothing to do with the leaven of the Pharisees, which is deceit.

Mark 8:15

And he said to them, Take care to be on the watch against the leaven of the Pharisees and the leaven of Herod.

1 Corinthians 5:6-8

This pride of yours is not good. Do you not see that a little leaven makes a change in all the mass?

Galatians 5:9

A little leaven makes a change in all the mass.

Exodus 12:15-19

For seven days let your food be unleavened bread; from the first day no leaven is to be seen in your houses: whoever takes bread with leaven in it, from the first till the seventh day, will be cut off from Israel.

Leviticus 2:11

No meal offering which you give to the Lord is to be made with leaven; no leaven or honey is to be burned as an offering made by fire to the Lord.

Matthew 16:12

Then they saw that it was not the leaven of bread which he had in mind, but the teaching of the Pharisees and Sadducees.

Luke 12:15

And he said to them, Take care to keep yourselves free from the desire for property; for a man's life is not made up of the number of things which he has.

2 Timothy 2:16-17

But take no part in wrong and foolish talk, for those who do so will go farther into evil,

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 saw that it was not the leaven of bread which he had in mind, but the teaching of the Pharisees and Sadducees.
Exodus 12:15
For seven days let your food be unleavened bread; from the first day no leaven is to be seen in your houses: whoever takes bread with leaven in it, from the first till the seventh day, will be cut off from Israel.
Leviticus 2:11
No meal offering which you give to the Lord is to be made with leaven; no leaven or honey is to be burned as an offering made by fire to the Lord.
Mark 8:15
And he said to them, Take care to be on the watch against the leaven of the Pharisees and the leaven of Herod.
Luke 12:1
At that time, when thousands of the people had come together, in such numbers that they were crushing one another, he said first to his disciples, Have nothing to do with the leaven of the Pharisees, which is deceit.
1 Corinthians 5:6
This pride of yours is not good. Do you not see that a little leaven makes a change in all the mass?
Galatians 5:9
A little leaven makes a change in all the mass.
2 Timothy 2:16
But take no part in wrong and foolish talk, for those who do so will go farther into evil,

General references

Exodus 13:7
Unleavened cakes are to be your food through all the seven days; let no leavened bread be seen among you, or any leaven, in any part of your land.
Proverbs 19:27
A son who no longer gives attention to teaching is turned away from the words of knowledge.
John 4:33
So the disciples said one to another, Did anyone give him food?

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain