'Things Sacrificed to Idols' in the Bible

Now about the things sacrificed to idols. We know that all have knowledge. Knowledge puffs up, but love builds up.

Therefore about eating the things sacrificed to idols, we know that an idol is nothing in the world, and that there is no other God except one.

For if some man sees thee, who have knowledge, dining in an idol-temple, will not his conscience, being weak, be strengthened to eat things sacrificed to idols?