Matthew 5:32

But I say unto you, That whosoever shall put away his wife, saving for the cause of fornication, causeth her to commit adultery: and whosoever shall marry her that is divorced committeth adultery.

Ver. 32. Saving for the cause of fornication] Taken in the largest sense for adultery also. Adulteriam est quasi ad alterum, aut alterius locum. (Becman de Originibus.) This sill strikes at the very sinew, heart, and life of the marriage knot, and dissolves it. Further, it directly lights against human society, which the law mainly respects, and was therefore to be punished with death, as a most notorious theft. "Master," say they, "this woman was taken in adultery, in the very act." In the very theft, saith the original (ετ αιτπφωρω, Joh 8:4), to intimate, belike, the great theft that is in adultery, while the child of a stranger carries away the goods or lands of the family. Neither may any conclude from our Saviour's words to that woman, Joh 8:11 "Neither do I condemn thee," that adultery is not to be punished; any more than he may, that inheritances are not to be divided, because Christ, who was no magistrate, would not divide them, Luke 12:14. The marriage bed is honourable, and should be kept inviolable; society and the purity of posterity cannot otherwise continue among men; which is well observed by divines to be the reason why adultery is named in the commandment, under it all uncleanness being forbidden; when yet other violations are more heinous, as sodomy and bestiality.

Causeth her to commit adultery] Because it is God that both maketh and keepeth the bonds of wedlock, which is therefore called, "the covenant of God," Proverbs 2:17. Covenants are either, 1. Religious, as when a man tieth himself by vow to God, to shun such a sin or do such a duty. 2. Civil, between man and man, as in our common contracts, bargains, and businesses. Or, 3. Mixed, that are made partly with God and partly with man. And of this sort is the marriage covenant, the parties thereby tie themselves first to God and then to one another. Hence it is that the knot is indissoluble, and cannot be undone or recalled at the pleasure of the parties that make it, because there is a third person engaged in the business, and that is God, to whom the bond is made; and if afterward they break, he will take the forfeiture. This David understood, and therefore upon his adultery cried out, "Against thee, thee only" (that is, chiefly) "have I sinned, and done this evil in thy sight," Psalms 51:4. A sin it is against the Father, whose covenant is broken; against the Son, whose members are made the members of a harlot; and against the Holy Ghost, whose temple is defiled, 1 Corinthians 6:19 .