Romans 14:5
One person regards one day holier than other days, and another regards them all alike. Each must be fully convinced in his own mind.
Romans 14:23
But the man who doubts is condemned if he eats, because he does not do so from faith, and whatever is not from faith is sin.
Romans 14:14
I know and am convinced in the Lord Jesus that there is nothing unclean in itself; still, it is unclean to the one who considers it unclean.
1 Corinthians 8:7
But this knowledge is not shared by all. And some, by being accustomed to idols in former times, eat this food as an idol sacrifice, and their conscience, because it is weak, is defiled.
1 Corinthians 8:11
So by your knowledge the weak brother or sister, for whom Christ died, is destroyed.
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 basic forces? Do you want to be enslaved to them all over again?
Colossians 2:16-17
Therefore do not let anyone judge you with respect to food or drink, or in the matter of a feast, new moon, or Sabbath days --
1 John 3:19-21
And by this we will know that we are of the truth and will convince our conscience in his presence,