Romans 14:5
One man esteemeth one day above another; another esteemeth every day alike: let each one be fully persuaded in his own mind. He that regardeth the day, regardeth it to the Lord;
Romans 14:23
But he that doubteth is condemned if he eat, because he doeth it not from faith; but every thing which is not from faith is sin.
Romans 14:14
I know, and am persuaded in the Lord Jesus, that nothing is unclean in itself; but to him that accounteth anything to be unclean, to him it is unclean.
1 Corinthians 8:7
But there is not in all men this knowledge; for some, with a conscience directed toward the idol even now, eat of it as a thing offered in sacrifice to an idol, and their conscience, being weak, is defiled.
1 Corinthians 8:11
For through thy knowledge he that is weak perisheth,the brother for whom Christ died!
Galatians 4:9-10
but now, after having known God, or rather having been known by God, how is it that ye are turning back to the weak and beggarly rudiments to which ye wish to be again in bondage?
Colossians 2:16-17
Let no one then call you to account about food or drink, or a feastday, 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;