Theophylact of Ohrid, on Heb 13:4

“Marriage honourable in all, and the bed undefiled. For fornicators and adulterers God will judge.”

“See how often he speaks about chastity. Above, when mentioning the holiness of marriage (Heb. 12:14), he spoke about this chastity, and again after this he speaks about adulterers and fornicators. Or: in all circumstances and at all times. Not only in affliction and not only in times of peace: not "honorable" in this respect only, and not in another, but let it be entirely honorable. Here also the heretics who slander marriage are put to shame. For behold, it is called honorable precisely because it is preserved in chastity. And here the prohibition of fornication is joined with the threat of punishment, for God judges, that is, will condemn. And naturally so. For if marriage is permitted, then the fornicator and adulterer is justly subjected to punishment.”

Imported from an open dataset — not yet checked against the printed edition.