'Things Sacrificed to Idols' in the Bible

Now concerning things sacrificed to idols, we know that we all have knowledge. Knowledge makes arrogant, but love edifies.

Therefore concerning the eating of things sacrificed to idols, we know that there is no such thing as an idol in the world, and that there is no God but one.

For if someone sees you, who have knowledge, dining in an idol’s temple, will not his conscience, if he is weak, be strengthened to eat things sacrificed to idols?