Romans 14:5
For one indeed judges a day above a day: another judges every day (alike); let each one be fully persuaded in his own mind.
Romans 14:23
but if he may eat doubting, he has been condemned, because it is not of faith; but every thing which is not of faith is sin.
Romans 14:14
I know, and am persuaded in the Lord Jesus, that there is nothing unclean of itself: except to him who considers it unclean, to him it is unclean.
1 Corinthians 8:7
But there is not knowledge in all people: but some, with the conscience of the idol even until now, eat as if it was sacrificed to the idol; and their conscience being weak is polluted.
1 Corinthians 8:11
For the weak one is destroyed by your knowledge, the brother for whom Christ died.
Colossians 2:16-17
Therefore let no one judge you in meat, or in drink, or in the participation of a feast, or of the new moon, or of the sabbath:
1 John 3:19-21
And in this we shall know that we are of the truth, and we shall assure our hearts before him;