Romans 14:5
One man esteems one day as better than another; another man esteems every day alike. Let each one be fully convinced in his own mind.
Romans 14:23
But he who has doubts is condemned if he eats, because he does not act from faith; for whatever is not from faith is sin.
Romans 14:14
I know and am convinced in the Lord Jesus that nothing is unclean in itself; but if anyone regards something as unclean, then for him it is unclean.
1 Corinthians 8:7
However, not all possess this knowledge. But some, being accustomed to idols, eat food as really sacrificed to an idol; and their conscience, being weak, is defiled.
1 Corinthians 8:11
And so by your knowledge this weak man is destroyed, the brother for whom Christ died.
Galatians 4:9-10
But now that you have come to know God, or rather to be known by God, how is it that you turn back again to the weak and worthless elemental things? Do you desire to be enslaved all over again?
Colossians 2:16-17
Therefore let no one judge you in questions of food or drink or with regard to a festival or a new moon or a Sabbath day.
1 John 3:19-21
By this we know that we are of the truth, and shall assure our hearts before him