Matthew 12:34

"You generation of vipers! How can you speak good, when you are evil? For the mouth speaks what the heart is full of. "When the time of fruit drew near, he sent his slaves to the vine-dressers seized to get his fruit.

Luke 6:45

"The good man out of the good treasure-house of his heart brings forth good; and the evil man out of the evil treasure-house of his heart brings forth evil; for the mouth speaks out of the abundance of the heart.

Matthew 23:33

"You serpents! You vipers brood! How shall you escape the judgment of hell?

Matthew 3:7

But when John saw that many of the Pharisees and Sadducees were coming for baptism, he said: "O brood of vipers! Who has warned you to flee from the wrath to come?

Matthew 15:18

while what comes out of the mouth comes from the heart??nd that is what defiles a man.

James 3:5-8

So also the tongue is a small member and makes great boasts. Behold, how great a forest is set on fire by a little spark!

Luke 3:7

So John used to say to the crowd of those who were going out to be baptized by him. "You breed of vipers, who has warned you to flee from the wrath to come?

Matthew 12:35

"A good man out of his good treasure brings forth good; and from his evil treasure a bad man brings out evil.

John 8:44

"You are of your father, the devil, and you want to do what your father desires. He was a man-slayer from the very beginning; and he has no standing place in the truth, because truth is not in him. Whenever he utters a lie, he speaks from his nature, for he is a liar and the father of lying.

Ephesians 4:29

From your lips let no evil words come forth, but such as occasion warrants, such as are good for upbuilding and give a blessing to the hearers.

Romans 3:10-14

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

1 John 3:10

In this the children of God are manifest, and the children of the devil; for every one who does not work righteousness is not a child of God, nor is 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 John saw that many of the Pharisees and Sadducees were coming for baptism, he said: "O brood of vipers! Who has warned you to flee from the wrath to come?
Matthew 23:33
"You serpents! You vipers brood! How shall you escape the judgment of hell?
Luke 3:7
So John used to say to the crowd of those who were going out to be baptized by him. "You breed of vipers, who has warned you to flee from the wrath to come?
John 8:44
"You are of your father, the devil, and you want to do what your father desires. He was a man-slayer from the very beginning; and he has no standing place in the truth, because truth is not in him. Whenever he utters a lie, he speaks from his nature, for he is a liar and the father of lying.
1 John 3:10
In this the children of God are manifest, and the children of the devil; for every one who does not work righteousness is not a child of God, nor is 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 member and makes great boasts. Behold, how great a forest is set on fire by a little spark!

For

Luke 6:45
"The good man out of the good treasure-house of his heart brings forth good; and the evil man out of the evil treasure-house of his heart brings forth evil; for the mouth speaks out of the abundance of the heart.

General references

Matthew 15:18
while what comes out of the mouth comes from the heart??nd that is what defiles a man.
Mark 7:20
"What comes out of a man," he continued, "is what defiles him.