Romans 14:5
One person esteems one day as better than another, while another esteems all days alike. Each one should be fully convinced in his own mind.
Romans 14:23
But whoever has doubts is condemned if he eats, because the eating is not from faith. For whatever does not proceed from faith is sin.
Romans 14:14
I know and am persuaded in the Lord Jesus that nothing is unclean in itself, but it is unclean for anyone who thinks it unclean.
1 Corinthians 8:7
However, not all possess this knowledge. But some, through former association with idols, eat food as really offered to an idol, and their conscience, being weak, is defiled.
1 Corinthians 8:11
And so by your knowledge this weak person 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 can you turn back again to the weak and worthless elementary principles of the world, whose slaves you want to be once more?
Colossians 2:16-17
Therefore let no one pass judgment on you in questions of food and drink, or with regard to a festival or a new moon or a Sabbath.
1 John 3:19-21
By this we shall know that we are of the truth and reassure our heart before him;