Romans 14:23
And he that makes a difference is condemned if he eats, because he does not eat by faith; and whatsoever is not out of faith is sin.
Romans 13:2
Whosoever therefore resists the power, resists the ordinance of God, and those that resist shall receive condemnation to themselves.
1 Corinthians 8:7
Howbeit there is not in everyone that knowledge, for some with conscience of the idol unto now, eat it as a thing offered unto an idol, and their conscience being weak is defiled.
1 Corinthians 11:29-31
For he that eats and drinks unworthily, eats and drinks judgment to himself, not discerning the Lord's body.
Romans 14:5
Also, some make a difference between one day and another; others esteem every day alike. Let each one be fully persuaded in his own soul.
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 11:6
But without faith it is impossible to please God; for he that comes to God must believe that he is and that he is a rewarder of those that diligently seek him.