Proverbs 15:28

The heart of the righteous considers how to answer, but the mouth of the wicked pours out evil things.

1 Peter 3:15

But set Christ apart as Lord in your hearts and always be ready to give an answer to anyone who asks about the hope you possess.

Proverbs 15:2

The tongue of the wise treats knowledge correctly, but the mouth of the fool spouts out folly.

1 Kings 3:23-28

The king said, "One says, 'My son is alive; your son is dead,' while the other says, 'No, your son is dead; my son is alive.'"

Proverbs 10:19

When words abound, transgression is inevitable, but the one who restrains his words is wise.

Proverbs 13:16

Every shrewd person acts with knowledge, but a fool displays his folly.

Proverbs 16:23

A wise person's heart makes his speech wise and it adds persuasiveness to his words.

Proverbs 29:11

A fool lets fly with all his temper, but a wise person keeps it back.

Proverbs 29:20

Do you see someone who is hasty in his words? There is more hope for a fool than for him.

Ecclesiastes 5:2

Do not be rash with your mouth or hasty in your heart to bring up a matter before God, for God is in heaven and you are on earth! Therefore, let your words be few.

Ecclesiastes 5:6

Do not let your mouth cause you to sin, and do not tell the priest, "It was a mistake!" Why make God angry at you so that he would destroy the work of your hands?"

Ecclesiastes 10:12-14

The words of a wise person win him favor, but the words of a fool are self-destructive.

Matthew 12:34

Offspring of vipers! How are you able to say anything good, since you are evil? For the mouth speaks from what fills the heart.

Titus 1:10-11

For there are many rebellious people, idle talkers, and deceivers, especially those with Jewish connections,

James 3:6-8

And the tongue is a fire! The tongue represents the world of wrongdoing among the parts of our bodies. It pollutes the entire body and sets fire to the course of human existence -- and is set on fire by hell.

2 Peter 2:18

For by speaking high-sounding but empty words they are able to entice, with fleshly desires and with debauchery, people who have just escaped from those who reside in error.

Treasury of Scripture Knowledge

Summary

The heart of the righteous studieth to answer: but the mouth of the wicked poureth out evil things.

General references

Bible References

Heart

Proverbs 15:2
The tongue of the wise treats knowledge correctly, but the mouth of the fool spouts out folly.
Proverbs 16:23
A wise person's heart makes his speech wise and it adds persuasiveness to his words.
1 Kings 3:23
The king said, "One says, 'My son is alive; your son is dead,' while the other says, 'No, your son is dead; my son is alive.'"
Ecclesiastes 5:2
Do not be rash with your mouth or hasty in your heart to bring up a matter before God, for God is in heaven and you are on earth! Therefore, let your words be few.
1 Peter 3:15
But set Christ apart as Lord in your hearts and always be ready to give an answer to anyone who asks about the hope you possess.

General references

Proverbs 14:33
Wisdom rests in the heart of the discerning; it is known even in the heart of fools.
Matthew 15:18
But the things that come out of the mouth come from the heart, and these things defile a person.

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