Mark 7:15

there is nothing from outside the man that entering into him can defile him, but the things which come out of him, those are what defile the man.

Leviticus 11:42-47

Whatever goes upon the belly and whatever goes upon four or more feet among all reptiles that creep upon the earth, ye shall not eat; for it is abomination.

Proverbs 4:23

Above all else, guard thy heart; for out of it flows the issues of life.

Matthew 12:34

O generation of vipers, how can ye, being evil, speak good things? For out of the abundance of the heart the mouth speaks.

Matthew 15:16

And Jesus said, Are ye also yet without understanding?

Mark 7:18-23

And he said unto them, Are ye so without understanding also? Do ye not understand that anything from outside that enters into the man cannot defile him?

Acts 10:14-16

But Peter said, Not so, Lord; for I have never eaten any thing that is common or unclean.

Acts 10:28

And he said unto them, Ye know how that it is an abominable thing for a man that is a Jew to keep company or come unto one of another nation; but God has showed me that I should not call any man common or unclean.

Acts 11:8-10

But I said, Not so, Lord, for nothing common or unclean has at any time entered into my mouth.

Acts 15:20-21

but that we write unto them that they abstain from pollutions of idols and from fornication and from things strangled and from blood.

Romans 14:17

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

1 Corinthians 10:25

Whatever is sold in the market, that eat, asking no question for conscience sake;

1 Timothy 4:3-5

they shall forbid to marry and shall command men to abstain from foods, which God has created to be received with thanksgiving by those who are faithful and have known the truth.

Titus 1:15

For unto the pure all things are pure, but unto those that are defiled and unfaithful, nothing is pure, but even their soul and conscience is defiled.

Hebrews 9:10

but in foods and drinks and different washings and carnal ordinances, imposed on them until the time of correction.

Hebrews 13:9

Be not taken out of the way with diverse and strange doctrines. For it is a good thing that the heart be established with grace, not with foods which have not profited those that have been occupied with 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 said unto them, Are ye so without understanding also? Do ye not understand that anything from outside that enters into the man cannot defile him?
Leviticus 11:42
Whatever goes upon the belly and whatever goes upon four or more feet among all reptiles that creep upon the earth, ye shall not eat; for it is abomination.
Acts 10:14
But Peter said, Not so, Lord; for I have never eaten any thing that is common or unclean.
Acts 11:8
But I said, Not so, Lord, for nothing common or unclean has at any time entered into my mouth.
Acts 15:20
but that we write unto them that they abstain from pollutions of idols and from fornication and from things strangled and from blood.
Romans 14:17
for the kingdom of God is not food and drink, but righteousness and peace and joy in the Holy Spirit.
1 Corinthians 10:25
Whatever is sold in the market, that eat, asking no question for conscience sake;
1 Timothy 4:3
they shall forbid to marry and shall command men to abstain from foods, which God has created to be received with thanksgiving by those who are faithful and have known the truth.
Titus 1:15
For unto the pure all things are pure, but unto those that are defiled and unfaithful, nothing is pure, but even their soul and conscience is defiled.
Hebrews 9:10
but in foods and drinks and different washings and carnal ordinances, imposed on them until the time of correction.
Hebrews 13:9
Be not taken out of the way with diverse and strange doctrines. For it is a good thing that the heart be established with grace, not with foods which have not profited those that have been occupied with them.

But

Mark 7:20
For he had said that it is what comes out of the man that defiles the man.
Proverbs 4:23
Above all else, guard thy heart; for out of it flows the issues of life.
Matthew 12:34
O generation of vipers, how can ye, being evil, speak good things? For out of the abundance of the heart the mouth speaks.
Matthew 15:16
And Jesus said, Are ye also yet without understanding?

General references

Leviticus 11:2
Speak unto the sons of Israel, saying, These are the animals which ye shall eat among all the animals that are on the earth.
Jeremiah 25:2
this spoke Jeremiah the prophet unto all the people of Judah and to all the inhabitants of Jerusalem, saying,
Matthew 13:9
He who has ears to hear, let him hear.
Mark 7:20
For he had said that it is what comes out of the man that defiles the man.