1 Corinthians 8:7

However , not all possess this knowledge . But some , through former association with idols , eat food as really offered to an idol , and their conscience , being weak , is defiled .

But not everyone possesses this knowledge. Some people are still so accustomed to idols that when they eat sacrificial food they think of it as having been sacrificed to a god, and since their conscience is weak, it is defiled.

Howbeit there is not in every man that knowledge : for some with conscience of the idol unto this hour eat it as a thing offered unto an idol; and their conscience being weak is defiled.