Romans 14:5
One preferreth some days to others; another esteemeth every day alike. Let every one be fully satisfied in his own mind.
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 14:14
I know and have been taught by the Lord Jesus, that nothing is unclean of itself: only to him that thinketh any thing unclean, to him it is unclean.
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 8:11
and so the weak brother, for whom Christ died, shall perish by thy knowledge?
Galatians 4:9-10
But now that ye know God, or rather are known by God, how is it that ye turn again to the poor weak elements, to which ye desire again to be in bondage as before?
Colossians 2:16-17
Let no one therefore judge you on account of meat, or drink, or in respect of a feast, or a new-moon, or sabbaths;
1 John 3:19-21
And hereby we know that we are of the truth, and shall assure our hearts before Him.