With conscience of the idol (τῇ συνειδήσει τοῦ εἰδώλου)
The best texts read συνηθείᾳ custom, which occurs only here and Joh 18:39; see note. Lit., with custom of the idol; i.e., as Rev., being used to the idol. Their long habit previous to their conversion made them still regard their offering as made to something really existent, and consequently to feel that it was sinful to eat of meat thus offered.