Matthew 15:18

But what comes out of the mouth proceeds from the heart, and this defiles a person.

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.

Proverbs 15:2

The tongue of the wise commends knowledge, but the mouths of fools pour out folly.

Proverbs 15:28

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

Matthew 15:11

it is not what goes into the mouth that defiles a person, but what comes out of the mouth; this defiles a person."

James 3:6-10

And the tongue is a fire, a world of unrighteousness. The tongue is set among our members, staining the whole body, setting on fire the entire course of life, and set on fire by hell.

1 Samuel 24:13

As the proverb of the ancients says, 'Out of the wicked comes wickedness.' But my hand shall not be against you.

Psalm 36:3

The words of his mouth are trouble and deceit; he has ceased to act wisely and do good.

Proverbs 6:12

A worthless person, a wicked man, goes about with crooked speech,

Proverbs 10:32

The lips of the righteous know what is acceptable, but the mouth of the wicked, what is perverse.

Luke 19:22

He said to him, 'I will condemn you with your own words, you wicked servant! You knew that I was a severe man, taking what I did not deposit and reaping what I did not sow?

Revelation 13:5-6

And the beast was given a mouth uttering haughty and blasphemous words, and it was allowed to exercise authority for forty-two months.

Treasury of Scripture Knowledge

Summary

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

Bible References

General references

Matthew 15:11
it is not what goes into the mouth that defiles a person, but what comes out of the mouth; this defiles a person."
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.
1 Samuel 24:13
As the proverb of the ancients says, 'Out of the wicked comes wickedness.' But my hand shall not be against you.
Psalm 36:3
The words of his mouth are trouble and deceit; he has ceased to act wisely and do good.
Proverbs 6:12
A worthless person, a wicked man, goes about with crooked speech,
Proverbs 10:32
The lips of the righteous know what is acceptable, but the mouth of the wicked, what is perverse.
Proverbs 15:2
The tongue of the wise commends knowledge, but the mouths of fools pour out folly.
Luke 19:22
He said to him, 'I will condemn you with your own words, you wicked servant! You knew that I was a severe man, taking what I did not deposit and reaping what I did not sow?
James 3:6
And the tongue is a fire, a world of unrighteousness. The tongue is set among our members, staining the whole body, setting on fire the entire course of life, and set on fire by hell.
Revelation 13:5
And the beast was given a mouth uttering haughty and blasphemous words, and it was allowed to exercise authority for forty-two months.

The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.