The weak in faith defile their conscience:
Related Commentaries of 1 Corinthians 8:7
1 Corinthians 8:7-8
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.
8 But meat commendeth us not to God: for neither, if we eat, are we the better;b neither, if we eat not, are we the worse.