Matthew 15:11

It is not what goes into a man's mouth that defiles him; but it is what comes out of his mouth--*that* defiles a man."

Acts 10:14-15

"On no account, Lord," he replied; "for I have never yet eaten anything unholy and impure."

Mark 7:15

There is nothing outside a man which entering him can make him unclean; but it is the things which come out of a man that make him unclean."

Matthew 12:34-37

O vipers' brood, how can you speak what is good when you are evil? For it is from the overflow of the heart that the mouth speaks.

Matthew 15:18-20

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

Luke 11:38-41

Now the Pharisee saw to his surprise that He did not wash His hands before breakfasting.

Acts 11:8-9

"'On no account, Lord,' I replied, 'for nothing unholy or impure has ever gone into my mouth.'

Romans 3:13-14

"Their throats resemble an opened grave; with their tongues they have been talking deceitfully." "The venom of vipers lies hidden behind their lips."

Romans 14:14

As one who lives in union with the Lord Jesus, I know and am certain that in its own nature no food is 'impure'; but if people regard any food as impure, to them it is.

Romans 14:17

For the Kingdom of God does not consist of eating and drinking, but of right conduct, peace and joy, through the Holy Spirit;

Romans 14:20

Do not for food's sake be throwing down God's work. All food is pure; but a man is in the wrong if his food is a snare to others.

1 Timothy 4:4-5

For everything that God has created is good, and nothing is to be cast aside, if only it is received with thanksgiving.

Titus 1:15

To the pure everything is pure; but to the polluted and unbelieving nothing is pure, but on the contrary their very minds and consciences are polluted.

Hebrews 13:9

Do not be drawn aside by all sorts of strange teaching; for it is well to have the heart made stedfast through God's grace, and not by special kinds of food, from which those who scrupulously attend to them have derived no benefit.

James 3:5-8

In the same way the tongue is an insignificant part of the body, but it is immensely boastful. Remember how a mere spark may set a vast forest in flames.

2 Peter 2:18

For, while they pour out their frivolous and arrogant talk, they use earthly cravings--every kind of immorality--as a bait to entrap men who are just escaping from the influence of those 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.

General references

Bible References

That which goeth

Mark 7:15
There is nothing outside a man which entering him can make him unclean; but it is the things which come out of a man that make him unclean."
Luke 11:38
Now the Pharisee saw to his surprise that He did not wash His hands before breakfasting.
Acts 10:14
"On no account, Lord," he replied; "for I have never yet eaten anything unholy and impure."
Acts 11:8
"'On no account, Lord,' I replied, 'for nothing unholy or impure has ever gone into my mouth.'
Romans 14:14
As one who lives in union with the Lord Jesus, I know and am certain that in its own nature no food is 'impure'; but if people regard any food as impure, to them it is.
1 Timothy 4:4
For everything that God has created is good, and nothing is to be cast aside, if only it is received with thanksgiving.
Titus 1:15
To the pure everything is pure; but to the polluted and unbelieving nothing is pure, but on the contrary their very minds and consciences are polluted.
Hebrews 13:9
Do not be drawn aside by all sorts of strange teaching; for it is well to have the heart made stedfast through God's grace, and not by special kinds of food, from which those who scrupulously attend to them have derived no benefit.

But

Matthew 15:18
But the things that come out of the mouth proceed from the heart, and it is these that defile the man.
Matthew 12:34
O vipers' brood, how can you speak what is good when you are evil? For it is from the overflow of the heart that the mouth speaks.
Romans 3:13
"Their throats resemble an opened grave; with their tongues they have been talking deceitfully." "The venom of vipers lies hidden behind their lips."
James 3:5
In the same way the tongue is an insignificant part of the body, but it is immensely boastful. Remember how a mere spark may set a vast forest in flames.
2 Peter 2:18
For, while they pour out their frivolous and arrogant talk, they use earthly cravings--every kind of immorality--as a bait to entrap men who are just escaping from the influence of those who live in error.

General references

Matthew 15:18
But the things that come out of the mouth proceed from the heart, and it is these that defile the man.
Luke 12:57
"Why, too, do you not of yourselves arrive at just conclusions?