Deuteronomy 28:30
Thou shalt betroth a wife, and another man shall lie with her: thou shalt build an house, and thou shalt not dwell therein: thou shalt plant a vineyard, and shalt not gather the grapes thereof. Thou shalt betroth a wife, and another man shall lie with her: thou shalt build an house, and thou shalt not dwell therein: thou shalt plant a vineyard, and shalt not gather the grapes thereof.
This is one of the curses Moses read to Israel as a warning about disobedience, foretelling loss in marriage, home, and vineyard. It belongs to the promised consequences of the law, under which God sends prosperity for obedience and adversity for transgression. That adversity is losing the fruit of one's labor, when another man takes the betrothed wife, the builder does not dwell in the house he built, and the planter does not gather the grapes of the vineyard he planted.
The chapter warns that disobedience brings a curse while obedience brings blessings. Losses in family life, home, and harvest show that disobedience brings hardship, and that God's threatened curses accompany the consequences of forsaking Him. Loss and hardship from transgressing God's commands stand in contrast to the blessings of obedience, leaving the choice whether to suffer the results of disobedience or enjoy the blessings of obedience. The Lord's promises to Israel were upon condition of obedience, and together with Deuteronomy 1 this explains why the adults of the army that left Egypt were refused entry into the promised land.
The chapter states plainly the blessings of obedience. It expresses the principles of the law of God's kingdom, made specific so that minds are not left in ignorance and uncertainty. It presents the never-ceasing obligation of all blessed with life and health and temporal and spiritual advantages, including gifts and offerings and the tithe for sustaining faithful messengers. The message has not grown weak with age, but God's claims remain just as binding and as fresh in importance as His gifts are fresh and continual.
The verse is to be read with Deuteronomy 7 and 8 and Exodus 15 to learn God's covenant of mercy, that if His people diligently hearken to His voice and do right and keep His commandments and statutes He will put none of the Egyptian diseases upon them, for He is the Lord who heals them. It shows the other side of that covenant, that disease of every kind comes because of sin. People bring disease by transgressing God's law and breaking down the barriers He erected to preserve them from disease, that they might live in health and holiness and learn obedience. Christ, enshrouded in the pillar of cloud, was their invisible leader and mighty Healer, able to cure the evils of the human heart as He put healing properties into the tree that sweetened the waters of Marah.