Mark 7:15

There is nothing from outside a man entering into him which can defile him; but the things which go out from him, those it is which defile the man.

Leviticus 11:42-47

Whatever goeth on the belly, and whatever goeth on all four, and all that have a great many feet, of every manner of crawling thing which crawleth on the earth these ye shall not eat; for they are an abomination.

Proverbs 4:23

Keep thy heart more than anything that is guarded; for out of it are the issues of life.

Matthew 12:34

Offspring of vipers! how can ye speak good things, being wicked? For of the abundance of the heart the mouth speaks.

Matthew 15:16

But he said, Are ye also still without intelligence?

Mark 7:18-23

And he says to them, Are ye also thus unintelligent? Do ye not perceive that all that is outside entering into the man cannot defile him,

Acts 10:14-16

And Peter said, In no wise, Lord; for I have never eaten anything common or unclean.

Acts 10:28

And he said to them, Ye know how it is unlawful for a Jew to be joined or come to one of a strange race, and to me God has shewn to call no man common or unclean.

Acts 11:8-10

And I said, In no wise, Lord, for common or unclean has never entered into my mouth.

Acts 15:20-21

but to write to them to abstain from pollutions of idols, and from fornication, and from what is strangled, and from blood.

Romans 14:17

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

1 Corinthians 10:25

Everything sold in the shambles eat, making no inquiry for conscience sake.

1 Timothy 4:3-5

forbidding to marry, bidding to abstain from meats, which God has created for receiving with thanksgiving for them who are faithful and know the truth.

Titus 1:15

All things are pure to the pure; but to the defiled and unbelieving nothing is pure; but both their mind and their conscience are defiled.

Hebrews 9:10

consisting only of meats and drinks and divers washings, ordinances of flesh, imposed until the time of setting things right.

Hebrews 13:9

Be not carried away with various and strange doctrines; for it is good that the heart be confirmed with grace, not meats; those who have walked in which have not been profited by them.

Treasury of Scripture Knowledge

Summary

There is nothing from without a man, that entering into him can defile him: but the things which come out of him, those are they that defile the man.

Bible References

Nothing

Mark 7:18
And he says to them, Are ye also thus unintelligent? Do ye not perceive that all that is outside entering into the man cannot defile him,
Leviticus 11:42
Whatever goeth on the belly, and whatever goeth on all four, and all that have a great many feet, of every manner of crawling thing which crawleth on the earth these ye shall not eat; for they are an abomination.
Acts 10:14
And Peter said, In no wise, Lord; for I have never eaten anything common or unclean.
Acts 11:8
And I said, In no wise, Lord, for common or unclean has never entered into my mouth.
Acts 15:20
but to write to them to abstain from pollutions of idols, and from fornication, and from what is strangled, and from blood.
Romans 14:17
for the kingdom of God is not eating and drinking, but righteousness, and peace, and joy in the Holy Spirit.
1 Corinthians 10:25
Everything sold in the shambles eat, making no inquiry for conscience sake.
1 Timothy 4:3
forbidding to marry, bidding to abstain from meats, which God has created for receiving with thanksgiving for them who are faithful and know the truth.
Titus 1:15
All things are pure to the pure; but to the defiled and unbelieving nothing is pure; but both their mind and their conscience are defiled.
Hebrews 9:10
consisting only of meats and drinks and divers washings, ordinances of flesh, imposed until the time of setting things right.
Hebrews 13:9
Be not carried away with various and strange doctrines; for it is good that the heart be confirmed with grace, not meats; those who have walked in which have not been profited by them.

But

Mark 7:20
And he said, That which goes forth out of the man, that defiles the man.
Proverbs 4:23
Keep thy heart more than anything that is guarded; for out of it are the issues of life.
Matthew 12:34
Offspring of vipers! how can ye speak good things, being wicked? For of the abundance of the heart the mouth speaks.
Matthew 15:16
But he said, Are ye also still without intelligence?

General references

Leviticus 11:2
Speak unto the children of Israel, saying, These are the animals which ye shall eat of all the beasts which are on the earth.
Jeremiah 25:2
which Jeremiah the prophet spoke unto all the people of Judah and to all the inhabitants of Jerusalem, saying:
Matthew 13:9
He that has ears, let him hear.
Mark 7:20
And he said, That which goes forth out of the man, that defiles the man.