1 Corinthians 8:4

4 So then, about eating food sacrificed to idols: We know that “An idol is nothing at all in the world” and that “There is no God but one.”

Read 1 Corinthians 8:4 Using Other Translations

As concerning therefore the eating of those things that are offered in sacrifice unto idols, we know that an idol is nothing in the world, and that there is none other God but one.
Therefore, as to the eating of food offered to idols, we know that "an idol has no real existence," and that "there is no God but one."
So, what about eating meat that has been offered to idols? Well, we all know that an idol is not really a god and that there is only one God.