Titus 1:15

to the pure all things are pure: but to corrupt infidels nothing is pure; whose very mind and conscience is polluted.

Romans 14:20

do not for such a thing as meat, pull down what God has been raising. all things indeed are pure; but they become evil to him who by eating giveth offence.

Romans 14:23

for he that makes a difference, is self-condemn'd, if he eats against his own persuasion: for every action of that kind is sin .

Romans 14:14

I know, being fully assured by the Lord Jesus, that there is nothing unclean of itself: it is only so to him that thinks it is unclean.

Matthew 15:18

but what proceeds out of the mouth, is deriv'd from the heart, and that defiles the man.

Acts 10:15

and the voice spake to him again the second time, don't call that common, which God calls clean.

Luke 11:39-41

upon which the Lord said to him, you Pharisees won't leave any filth upon the outside of a cup or a platter: while your consciences are abandon'd to rapine, and sensuality.

1 Corinthians 6:12-13

Are all things lawful for me? however, all things are not expedient: are all things lawful for me? however, I will not be a slave to any.

1 Corinthians 8:7

But every one has not this knowledge: for some still imagine the idol represents a deity: and eat the meat under the notion of an offering to such a being: by which erroneous opinion they are infected with idolatry.

1 Corinthians 10:23

are all things lawful for me? yet all things are not expedient: are all things lawful for me? yet all things do not edify.

1 Corinthians 10:25

whatever is sold in the shambles, that eat, without making any scrupulous enquiry.

1 Corinthians 10:31

whether therefore you eat or drink, or whatsoever you do, do all to the glory of God.

1 Corinthians 11:27-29

so that whosoever eats this bread, and drinks this cup without respect to the Lord, does make a criminal use of the body and blood of the Lord.

1 Timothy 4:3-4

interdicting marriage; and the use of animal food; which God created for the repast of the faithful, who embrace the truth with thankfulness.

1 Timothy 6:5

mischievous opinions, and a familiarity with pernicious ignorant impostors, who consider religion only as it makes for their gain.

Hebrews 9:14

how much more shall the blood of Christ, who through the holy spirit offered himself a spotless victim to God, purify our souls from deadly sins, to serve the living God?

Hebrews 10:22

let us draw near with sincerity, in full assurance of faith, having our consciences purified from guilt, and our bodies washed with pure water.

Treasury of Scripture Knowledge

Summary

Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.

General references

Bible References

The pure

Luke 11:39
upon which the Lord said to him, you Pharisees won't leave any filth upon the outside of a cup or a platter: while your consciences are abandon'd to rapine, and sensuality.
Acts 10:15
and the voice spake to him again the second time, don't call that common, which God calls clean.
Romans 14:14
I know, being fully assured by the Lord Jesus, that there is nothing unclean of itself: it is only so to him that thinks it is unclean.
1 Corinthians 6:12
Are all things lawful for me? however, all things are not expedient: are all things lawful for me? however, I will not be a slave to any.
1 Corinthians 10:23
are all things lawful for me? yet all things are not expedient: are all things lawful for me? yet all things do not edify.
1 Timothy 4:3
interdicting marriage; and the use of animal food; which God created for the repast of the faithful, who embrace the truth with thankfulness.

Their

1 Corinthians 8:7
But every one has not this knowledge: for some still imagine the idol represents a deity: and eat the meat under the notion of an offering to such a being: by which erroneous opinion they are infected with idolatry.
Hebrews 9:14
how much more shall the blood of Christ, who through the holy spirit offered himself a spotless victim to God, purify our souls from deadly sins, to serve the living God?
Hebrews 10:22
let us draw near with sincerity, in full assurance of faith, having our consciences purified from guilt, and our bodies washed with pure water.

General references

Acts 24:16
and 'tis my endeavour to preserve a conscience free from reproach both with respect to God, and with respect to men.