Mark 7:15

There is nothing without a man that can defile him when it entereth into him, but those things which proceed out of him are those which defile the man.

Leviticus 11:42-47

And whatsoever goeth upon the breast, and whatsoever goeth upon four or more feet among all that crawleth upon the earth, of that see ye eat not: for they are abominable.

Proverbs 4:23

Keep thine heart with all diligence, for thereupon hangeth life.

Matthew 12:34

O generation of vipers, how can ye say well, when ye yourselves are evil? For of the abundance of the heart, the mouth speaketh.

Matthew 15:16

Then said Jesus, "Are ye yet without an understanding?

Mark 7:18-23

and he said unto them, "Are ye so without understanding? Do ye not yet perceive, that whatsoever thing from without entereth into a man, it cannot defile him,

Acts 10:14-16

But Peter said, "God forbid Lord, for I have never eaten anything that is common or unclean."

Acts 10:28

And he said unto them, "Ye do know how that it is an unlawful thing for a man that is a Jew to company or come unto an alien: But God hath showed me that I should not call any man common or unclean:

Acts 11:8-10

And I said, 'God forbid Lord, for nothing common or unclean hath at any time entered into my mouth.'

Acts 15:20-21

but that we write unto them, that they abstain themselves from filthiness of images, from fornication, from strangled, and from blood.

Romans 14:17

For the kingdom of God is not meat and drink, but righteousness, peace and joy, in the holy ghost.

1 Corinthians 10:25

Whatsoever is sold in the market, that eat, and ask no questions for conscience sake.

1 Timothy 4:3-5

forbidding to marry, and commanding to abstain from meats, which God hath created to be received with giving thanks, of them which believe, and know the truth.

Titus 1:15

Unto the pure, are all things pure: but unto them that are defiled, and unbelieving, is nothing pure: but even the very minds and consciences of them are defiled.

Hebrews 9:10

with meats only and drinks, and divers washings, and justifyings of the flesh, which were ordained until the time of reformation.

Hebrews 13:9

Be not carried about with divers and strange learning. For it is a good thing that the heart be established with grace, and not with meats, which have not profited them that have had their pastime in 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? Do ye not yet perceive, that whatsoever thing from without entereth into a man, it cannot defile him,
Leviticus 11:42
And whatsoever goeth upon the breast, and whatsoever goeth upon four or more feet among all that crawleth upon the earth, of that see ye eat not: for they are abominable.
Acts 10:14
But Peter said, "God forbid Lord, for I have never eaten anything that is common or unclean."
Acts 11:8
And I said, 'God forbid Lord, for nothing common or unclean hath at any time entered into my mouth.'
Acts 15:20
but that we write unto them, that they abstain themselves from filthiness of images, from fornication, from strangled, and from blood.
Romans 14:17
For the kingdom of God is not meat and drink, but righteousness, peace and joy, in the holy ghost.
1 Corinthians 10:25
Whatsoever is sold in the market, that eat, and ask no questions for conscience sake.
1 Timothy 4:3
forbidding to marry, and commanding to abstain from meats, which God hath created to be received with giving thanks, of them which believe, and know the truth.
Titus 1:15
Unto the pure, are all things pure: but unto them that are defiled, and unbelieving, is nothing pure: but even the very minds and consciences of them are defiled.
Hebrews 9:10
with meats only and drinks, and divers washings, and justifyings of the flesh, which were ordained until the time of reformation.
Hebrews 13:9
Be not carried about with divers and strange learning. For it is a good thing that the heart be established with grace, and not with meats, which have not profited them that have had their pastime in them.

But

Mark 7:20
And he said, "That defileth a man which cometh out of a man.
Proverbs 4:23
Keep thine heart with all diligence, for thereupon hangeth life.
Matthew 12:34
O generation of vipers, how can ye say well, when ye yourselves are evil? For of the abundance of the heart, the mouth speaketh.
Matthew 15:16
Then said Jesus, "Are ye yet without an understanding?

General references

Leviticus 11:2
"Speak unto the children of Israel and say, 'These are the beasts which ye shall eat among all the beasts that are on the earth:
Jeremiah 25:2
Which sermon Jeremiah the prophet made unto all the people of Judah, and to all the inhabiters of Jerusalem, on this manner.
Matthew 13:9
Whosoever hath ears to hear, let him hear."
Mark 7:20
And he said, "That defileth a man which cometh out of a man.