Luke 12:1

Meanwhile the people had gathered in thousands, so that they trod upon one another, when Jesus, addressing himself to his disciples, began by saying to them: "Be on your guard against the leaven--that is, the hypocrisy--of the Pharisees.

James 3:17

But the wisdom from above is, before every thing else, pure; then peace-loving, gentle, open to conviction, rich in compassion and good deeds, and free from partiality and insincerity.

1 Corinthians 5:7-8

Get rid entirely of the old leaven, so that you may be like new dough-free from leaven, as in truth you are. For our Passover Lamb is already sacrificed-Christ himself;

Matthew 16:6-12

Presently Jesus said to them: "Take care and be on your guard against the leaven of the Pharisees and Sadducees."

Mark 8:15-21

So Jesus gave them this warning. "Take care," he said, "beware of the leaven of the Pharisees and the leaven of Herod."

Luke 5:1

Once, when the people were pressing round Jesus as the listened to God's Message, he happened to be standing by the shore of the Lake of Gennesaret, and saw two boats close to the shore.

Luke 5:15

However, the story about Jesus spread all the more, and great crowds came together to listen to him, and to be cured of their illnesses;

Luke 6:17

Afterwards Jesus came down the hill with them and took his stand on a level place. With him were a large crowd of his disciples, and great numbers of people from the whole of Judea, Jerusalem, and the coast district of Tyre and Sidon,

Luke 11:44

Alas for you! You are like unsuspected graves, over which men walk unawares."

Luke 12:56

Hypocrites! You know how to judge of the earth and the sky; how is it, then, that you cannot judge of this time?

Acts 21:20

And, when they had heard it, they began praising God, and said to Paul: "You see, Brother, that the Jews who have become believers in Christ may be numbered by tens of thousands, and they are all naturally earnest in upholding the Jewish Law.

1 Corinthians 15:3

For at the very beginning of my teaching I gave you the account which I had myself received-that Christ died for our sins (as the Scriptures had foretold),

1 Peter 2:1

Now that you have done with all malice, all deceitfulness, insincerity, jealous feelings, and all back-biting,

Treasury of Scripture Knowledge

Summary

In the mean time, when there were gathered together an innumerable multitude of people, insomuch that they trode one upon another, he began to say unto his disciples first of all, Beware ye of the leaven of the Pharisees, which is hypocrisy.

Bible References

First

1 Corinthians 15:3
For at the very beginning of my teaching I gave you the account which I had myself received-that Christ died for our sins (as the Scriptures had foretold),
James 3:17
But the wisdom from above is, before every thing else, pure; then peace-loving, gentle, open to conviction, rich in compassion and good deeds, and free from partiality and insincerity.

Which

Luke 12:56
Hypocrites! You know how to judge of the earth and the sky; how is it, then, that you cannot judge of this time?
Luke 11:44
Alas for you! You are like unsuspected graves, over which men walk unawares."
James 3:17
But the wisdom from above is, before every thing else, pure; then peace-loving, gentle, open to conviction, rich in compassion and good deeds, and free from partiality and insincerity.
1 Peter 2:1
Now that you have done with all malice, all deceitfulness, insincerity, jealous feelings, and all back-biting,

General references

Matthew 23:1
Then Jesus speaking to the crowds and to his disciples, said:
Luke 14:25
One day, when great crowds of people were walking with Jesus, he turned and said to them:
Galatians 5:9
A little leaven leavens all the dough.