Matthew 19:6

Wherefore. Jesus here proceeds to state the conclusion to be drawn from the fundamental principle of the marriage relationship cited from Gen. 2:24.

No more twain. In the sight of God, husband and wife are one entity, and therefore should be no more divisible than one human body is.

What. That is, the new union formed at marriage (v. 5).

God hath joined. The marriage relationship was instituted by God, sanctified by God. It was an All-wise Creator who provided for the marriage relationship; it is He who made it possible and desirable. All who enter upon the marriage relationship are therefore “joined,” according to the original plan of God, for life.

Let not man put asunder. With the single exception for which Jesus makes provision (see on v. 9), divorce cannot be honored or recognized in heaven. In the sight of God any alliance either of them may enter into with another woman or man, as the case may be, is branded by Christ as adultery.