Matthew 12:34

You brood of vipers! how can you, evil as you are, say anything good? For what fills the heart will rise to the lips.

Luke 6:45

A good man, from the good stores of his heart, brings out what is good; while a bad man, from his bad stores, brings out what is bad. For what fills a man's heart will rise to his lips.

Matthew 23:33

You serpents and brood of vipers! How can you escape being sentenced to the Pit?

Matthew 3:7

When, however, John saw many of the Pharisees and Sadducees coming to receive his baptism, he said to them: "You brood of vipers! Who has prompted you to seek refuge from the coming judgment?

Matthew 15:18

But the things that come out from the mouth proceed from the heart, and it is these that defile a man;

James 3:5-8

So is it with the tongue. Small as it is, it is a great boaster. Think how tiny a spark may set the largest forest ablaze!

Luke 3:7

And John said to the crowds that went to be baptized by him: "You brood of vipers! who has prompted you to seek refuge from the coming judgment?

Matthew 12:35

A good man, from his good stores, produces good things; while an evil man, from his evil stores, produces evil things.

John 8:44

As for you, you are children of your Father the Devil, and you are determined to do what your father loves to do. He was a murderer from the first, and did not stand by the truth, because there is no truth in him. Whenever he lies, he does what is natural to him; because he is a liar, and the father of lying.

Ephesians 4:29

Never let any foul word pass your lips, but only such good words as the occasion demands, that they may be a help to those who hear them.

Romans 3:10-14

As Scripture says-'There is not even one who is righteous,

1 John 3:10

By this the Children of God are distinguished from the Children of the Devil--No one who lives unrighteously comes from God, and especially the man who does not love his Brother.

Treasury of Scripture Knowledge

Summary

O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.

For

General references

Bible References

Generation

Matthew 3:7
When, however, John saw many of the Pharisees and Sadducees coming to receive his baptism, he said to them: "You brood of vipers! Who has prompted you to seek refuge from the coming judgment?
Matthew 23:33
You serpents and brood of vipers! How can you escape being sentenced to the Pit?
Luke 3:7
And John said to the crowds that went to be baptized by him: "You brood of vipers! who has prompted you to seek refuge from the coming judgment?
John 8:44
As for you, you are children of your Father the Devil, and you are determined to do what your father loves to do. He was a murderer from the first, and did not stand by the truth, because there is no truth in him. Whenever he lies, he does what is natural to him; because he is a liar, and the father of lying.
1 John 3:10
By this the Children of God are distinguished from the Children of the Devil--No one who lives unrighteously comes from God, and especially the man who does not love his Brother.

How

Romans 3:10
As Scripture says-'There is not even one who is righteous,
James 3:5
So is it with the tongue. Small as it is, it is a great boaster. Think how tiny a spark may set the largest forest ablaze!

For

Luke 6:45
A good man, from the good stores of his heart, brings out what is good; while a bad man, from his bad stores, brings out what is bad. For what fills a man's heart will rise to his lips.

General references

Matthew 15:18
But the things that come out from the mouth proceed from the heart, and it is these that defile a man;
Mark 7:20
"It is what comes out from a man," he added, "that defiles him,