John Chrysostom

"If one of them that believe not biddeth you," saith he, "to a feast, and you are disposed to go; whatsoever is set before you, eat, asking no question for conscience sake." See again his moderation. For he did not command and make a law that they should withdraw themselves, yet neither did he forbid it. And again, should they depart, he frees them from all suspicion. Now what may be the account of this? That so great curiousness might not seem to arise from any fear and cowardice. …

Homily on 1 Corinthians 25 ↗

Theophylact of Ohrid

He said well: "you wish"; for he himself did not want either to advise or to disadvise. Do not investigate at all, so that in excessive scrupulousness you do not show fear before idols, and so that you keep your conscience clean and undisturbed.

Commentary on 1 Corinthians ↗

Clement of Alexandria

Wherefore daintiness is to be shunned, and we are to partake of few and necessary things. "And if one of the unbelievers call us to a feast, and we determine to go" (for it is a good thing not to mix with the dissolute), the apostle bids us "eat what is set before us, asking no questions for conscience sake." Similarly he has enjoined to purchase "what is sold in the shambles," without curious questioning. We are not, then, to abstain wholly from various kinds of food, but only are not to be taken up about them. …

The Instructor Book 2 ↗