John Chrysostom

"Neither let us commit fornication, as some of them committed." Wherefore doth he here make mention of fornication again, having so largely discoursed concerning it before? It is ever Paul's custom when he brings a charge of many sins, both to set them forth in order and separately to proceed with his proposed topics, and again in his discourses concerning other things to make mention also of the former: which thing God also used to do in the Old Testament, in reference to each several transgression, reminding the Jews of the calf …

Homily on 1 Corinthians 23 ↗

Theophylact of Ohrid

Again he mentioned fornication, so that through constant reproof he might make his word more effective. This sin also is born from gluttony. And when did twenty-three thousand perish? When, by the counsel of Balaam, the Midianite women appeared at the camp, enticed the young men to themselves, and through fornication led them to offer sacrifice to Baal-Peor, and the people who were in the camp perished (Num. 25:1–9).

Commentary on 1 Corinthians ↗

Clement of Alexandria

Remember the four and twenty thousand that were rejected for fornication.

The Instructor Book 2 ↗