John Chrysostom

Next, because he brought in the saying by way of exhortation, lest any of the grosser sort should make light of it as having license, because he said, "I would not," and, "judge ye;" he positively affirms in what follows and lays down the law, saying, "Ye cannot drink the cup of the Lord, and the cup of demons: ye cannot partake of the Lord's table, and of the table of demons." And he contents himself with the mere terms, for the purpose of keeping them away.

Homily on 1 Corinthians 24 ↗

Theophylact of Ohrid

In the form of an exhortation he said: "I do not want you to be in communion with demons." Lest this exhortation be disregarded, he now expresses the same thought in a negative form: "You cannot drink the cup of the Lord and the cup of demons." By the names alone he proves that one must necessarily abstain from food offered to idols.

Commentary on 1 Corinthians ↗

Cosmas Indicopleustes

And though ye allow that the universe was created in six days, yet ye find no mention of the making of a third heaven, and far less of the eight or nine which ye venture to affirm. How great is your knowledge! how great your wisdom! how great your intelligence! how great your inconsistency! No man can serve two masters, as has well been said by the Lord, but if one will serve God, let him serve him, or if Mammon, then Mammon. And again he says, through Paul: Ye cannot be partakers of the table of the Lord, and of the table of devils. …

The Christian Topography, Book 4 ↗