1 Corinthians 8:7

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.

However, that knowledge isn't in all men. But some, with consciousness of the idol until now, eat as of a thing sacrificed to an idol, and their conscience, being weak, is defiled.

Howbeit there is not in all men that knowledge: but some, being used until now to the idol, eat as `of' a thing sacrificed to an idol; and their conscience being weak is defiled.

but not in all men `is' the knowledge, and certain with conscience of the idol, till now, as a thing sacrificed to an idol do eat `it', and their conscience, being weak, is defiled.

But not everyone has this knowledge. Some people are still so accustomed to idols that they eat such food as if it were sacrificed to an idol. And since their conscience is weak, it is defiled.