Romans 14:12-14

So then, each of us will give an account of ourselves to God. Therefore let us stop passing judgment on one another. Instead, make up your mind not to put any stumbling-block or obstacle in the way of a brother or sister. I am convinced, being fully persuaded in the Lord Jesus, that nothing is unclean in itself. But if anyone regards something as unclean, then for that person it is unclean.