Deuteronomy 20:7

that hath betrothed, etc.] Cp. Deuteronomy 24:5, exempting the newly-married from service for a year. The reason can hardly be that he was unclean for, as in the case of other married men, this obstacle could be removed (2 Samuel 11:6 f.). Evidently the motive is humane, in the wife's interests, or in order to secure descendants to the man himself.