Matthew 15:11

It is not what enters into the mouth that defiles the man, but what proceeds out of the mouth, this defiles the man.”

Acts 10:14-15

But Peter said, “By no means, Lord, for I have never eaten anything unholy and unclean.”

Mark 7:15

there is nothing outside the man which can defile him if it goes into him; but the things which proceed out of the man are what defile the man.

Psalm 10:7

His mouth is full of curses and deceit and oppression;
Under his tongue is mischief and wickedness.

Psalm 12:2

They speak falsehood to one another;
With flattering lips and with a double heart they speak.

Psalm 52:2-4

Your tongue devises destruction,
Like a sharp razor, O worker of deceit.

Psalm 58:3-4

The wicked are estranged from the womb;
These who speak lies go astray from birth.

Isaiah 37:23

“Whom have you reproached and blasphemed?
And against whom have you raised your voice
And haughtily lifted up your eyes?
Against the Holy One of Israel!

Isaiah 59:3-5

For your hands are defiled with blood
And your fingers with iniquity;
Your lips have spoken falsehood,
Your tongue mutters wickedness.

Isaiah 59:13-15

Transgressing and denying the Lord,
And turning away from our God,
Speaking oppression and revolt,
Conceiving in and uttering from the heart lying words.

Jeremiah 9:3-6

“They bend their tongue like their bow;
Lies and not truth prevail in the land;
For they proceed from evil to evil,
And they do not know Me,” declares the Lord.

Matthew 12:34-37

You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart.

Matthew 15:18-20

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

Luke 11:38-41

When the Pharisee saw it, he was surprised that He had not first ceremonially washed before the meal.

Acts 11:8-9

But I said, ‘By no means, Lord, for nothing unholy or unclean has ever entered my mouth.’

Romans 3:13-14

Their throat is an open grave,
With their tongues they keep deceiving,”
The poison of asps is under their lips”;

Romans 14:14

I know and am convinced in the Lord Jesus that nothing is unclean in itself; but to him who thinks anything to be unclean, to him it is unclean.

Romans 14:17

for the kingdom of God is not eating and drinking, but righteousness and peace and joy in the Holy Spirit.

Romans 14:20

Do not tear down the work of God for the sake of food. All things indeed are clean, but they are evil for the man who eats and gives offense.

1 Timothy 4:4-5

For everything created by God is good, and nothing is to be rejected if it is received with gratitude;

Titus 1:15

To the pure, all things are pure; but to those who are defiled and unbelieving, nothing is pure, but both their mind and their conscience are defiled.

Hebrews 13:9

Do not be carried away by varied and strange teachings; for it is good for the heart to be strengthened by grace, not by foods, through which those who were so occupied were not benefited.

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!

2 Peter 2:18

For speaking out arrogant words of vanity they entice by fleshly desires, by sensuality, those who barely escape from the ones who live in error,

Treasury of Scripture Knowledge

Summary

Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.

Bible References

That which goeth

Mark 7:15
there is nothing outside the man which can defile him if it goes into him; but the things which proceed out of the man are what defile the man.
Luke 11:38
When the Pharisee saw it, he was surprised that He had not first ceremonially washed before the meal.
Acts 10:14
But Peter said, “By no means, Lord, for I have never eaten anything unholy and unclean.”
Acts 11:8
But I said, ‘By no means, Lord, for nothing unholy or unclean has ever entered my mouth.’
Romans 14:14
I know and am convinced in the Lord Jesus that nothing is unclean in itself; but to him who thinks anything to be unclean, to him it is unclean.
1 Timothy 4:4
For everything created by God is good, and nothing is to be rejected if it is received with gratitude;
Titus 1:15
To the pure, all things are pure; but to those who are defiled and unbelieving, nothing is pure, but both their mind and their conscience are defiled.
Hebrews 13:9
Do not be carried away by varied and strange teachings; for it is good for the heart to be strengthened by grace, not by foods, through which those who were so occupied were not benefited.

But

Matthew 15:18
But the things that proceed out of the mouth come from the heart, and those defile the man.
Matthew 12:34
You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart.
Psalm 10:7
His mouth is full of curses and deceit and oppression;
Under his tongue is mischief and wickedness.
Psalm 12:2
They speak falsehood to one another;
With flattering lips and with a double heart they speak.
Psalm 52:2
Your tongue devises destruction,
Like a sharp razor, O worker of deceit.
Psalm 58:3
The wicked are estranged from the womb;
These who speak lies go astray from birth.
Isaiah 37:23
“Whom have you reproached and blasphemed?
And against whom have you raised your voice
And haughtily lifted up your eyes?
Against the Holy One of Israel!
Isaiah 59:3
For your hands are defiled with blood
And your fingers with iniquity;
Your lips have spoken falsehood,
Your tongue mutters wickedness.
Jeremiah 9:3
“They bend their tongue like their bow;
Lies and not truth prevail in the land;
For they proceed from evil to evil,
And they do not know Me,” declares the Lord.
Romans 3:13
Their throat is an open grave,
With their tongues they keep deceiving,”
The poison of asps is under their lips”;
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!
2 Peter 2:18
For speaking out arrogant words of vanity they entice by fleshly desires, by sensuality, those who barely escape from the ones who live in error,

General references

Leviticus 11:2
“Speak to the sons of Israel, saying, ‘These are the creatures which you may eat from all the animals that are on the earth.
Matthew 15:18
But the things that proceed out of the mouth come from the heart, and those defile the man.
Luke 12:57
“And why do you not even on your own initiative judge what is right?