Matthew 12:34

You brood of vipers! how can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.

Luke 6:45

The good man out of the good treasure of his heart brings forth good, and an evil man out of the evil treasure of his heart brings forth evil. For out of the abundance of the heart his mouth speaks.

Matthew 23:33

You serpents! You brood of vipers, how are you to escape being sentenced to hell?

Matthew 3:7

But when he saw many of the Pharisees and Sadducees coming for baptism, he said to them, "You brood of vipers! Who warned you to flee from the wrath to come?

Matthew 15:18

But those things which proceed out of the mouth come from the heart, and they defile a man.

James 3:5-8

So also the tongue is a small part of the body, and yet it boasts of great things. See how great a forest is set aflame by such a small fire!

Luke 3:7

Then he said to the multitudes that came out to be baptized by him, "You brood of vipers! Who warned you to flee from the wrath to come?

Matthew 12:35

The good man out of the good treasure of his heart brings forth good things, and an evil man out of the evil treasure brings forth evil things.

John 8:44

You are of your father the devil, and you want to do your father's desires. He was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. When he lies, he speaks according to his own nature, for he is a liar and the father of lies.

Ephesians 4:29

Let no unwholesome talk come out of your mouths, but only such as is good for building others up according to the need of the moment, that it may impart grace to those who hear.

Romans 3:10-14

As it is written: "There is none righteous, no, not one;

1 John 3:10

By this it may be seen who are the children of God, and who are the children of the devil: whoever does not do right is not of God, nor he 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
But when he saw many of the Pharisees and Sadducees coming for baptism, he said to them, "You brood of vipers! Who warned you to flee from the wrath to come?
Matthew 23:33
You serpents! You brood of vipers, how are you to escape being sentenced to hell?
Luke 3:7
Then he said to the multitudes that came out to be baptized by him, "You brood of vipers! Who warned you to flee from the wrath to come?
John 8:44
You are of your father the devil, and you want to do your father's desires. He was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. When he lies, he speaks according to his own nature, for he is a liar and the father of lies.
1 John 3:10
By this it may be seen who are the children of God, and who are the children of the devil: whoever does not do right is not of God, nor he who does not love his brother.

How

Romans 3:10
As it is written: "There is none righteous, no, not one;
James 3:5
So also the tongue is a small part of the body, and yet it boasts of great things. See how great a forest is set aflame by such a small fire!

For

Luke 6:45
The good man out of the good treasure of his heart brings forth good, and an evil man out of the evil treasure of his heart brings forth evil. For out of the abundance of the heart his mouth speaks.

General references

Matthew 15:18
But those things which proceed out of the mouth come from the heart, and they defile a man.
Mark 7:20
And he said, "What comes out of a man is what defiles a man.