Romans 14:23

But he that hath any scruple, is condemned if he eat; because he doth it not with faith: and whatsoever is not of faith, is sin.

Romans 13:2

So that he who resisteth the power, resisteth the ordinance of God: and they that resist shall receive condemnation.

1 Corinthians 8:7

But there is not in all men this knowledge: and some with a consciousness of the idol unto this day, eat it as a thing sacrificed to an idol, and so their conscience being weak is defiled.

1 Corinthians 11:29-31

for he that eateth and drinketh unworthily, eateth and drinketh judgement against himself, not distinguishing the Lord's body.

Romans 14:5

One preferreth some days to others; another esteemeth every day alike. Let every one be fully satisfied in his own mind.

Titus 1:15

To the pure indeed all things are pure; but to the polluted and unbelieving nothing is pure; even their mind and conscience is polluted.

Hebrews 11:6

whereas without faith it is impossible to please Him; for he that cometh to God must believe, that He is, and is the rewarder of them that diligently seek Him.

Treasury of Scripture Knowledge

Summary

And he that doubteth is damned if he eat, because he eateth not of faith: for whatsoever is not of faith is sin.

Bible References

He that

1 Corinthians 8:7
But there is not in all men this knowledge: and some with a consciousness of the idol unto this day, eat it as a thing sacrificed to an idol, and so their conscience being weak is defiled.

Damned

Romans 13:2
So that he who resisteth the power, resisteth the ordinance of God: and they that resist shall receive condemnation.
1 Corinthians 11:29
for he that eateth and drinketh unworthily, eateth and drinketh judgement against himself, not distinguishing the Lord's body.

Whatsoever

Titus 1:15
To the pure indeed all things are pure; but to the polluted and unbelieving nothing is pure; even their mind and conscience is polluted.
Hebrews 11:6
whereas without faith it is impossible to please Him; for he that cometh to God must believe, that He is, and is the rewarder of them that diligently seek Him.