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 13:2

so that he who opposes the ruler, disobeys the orders of God: and will be punished too for resisting, by those very powers.

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 11:29-31

for he that eats and drinks in a disrespectful manner, not discriminating the Lord's body, eateth and drinketh to his own punishment.

Romans 14:5

one man thinks one day fitter for religious worship than another: another thinks every day alike. let every man follow the persuasion of his own mind.

Titus 1:15

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

Hebrews 11:6

now without faith it is impossible to be acceptable to him: for he that presents himself to God, cannot but believe he exists, and that he is a rewarder of those who make their addresses to 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 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.

Damned

Romans 13:2
so that he who opposes the ruler, disobeys the orders of God: and will be punished too for resisting, by those very powers.
1 Corinthians 11:29
for he that eats and drinks in a disrespectful manner, not discriminating the Lord's body, eateth and drinketh to his own punishment.

Whatsoever

Titus 1:15
to the pure all things are pure: but to corrupt infidels nothing is pure; whose very mind and conscience is polluted.
Hebrews 11:6
now without faith it is impossible to be acceptable to him: for he that presents himself to God, cannot but believe he exists, and that he is a rewarder of those who make their addresses to him.