John Gill Commentary Deuteronomy 28:30

"Thou shalt betroth a wife, and another man shall lie with her: thou shalt build a house, and thou shalt not dwell therein: thou shalt plant a vineyard, and shalt not use the fruit thereof." — Deuteronomy 28:30 (ASV)

You shall betroth a wife, and another man shall lie with
her
Espouse a woman in order to make her his wife, and before he can take her home, and consummate the marriage, through some calamity or another coming upon them, they should be set at a distance from each other, and she should fall into the hands of another man, who either should ravish her, or gain her consent to lie with her, or become his wife.

Which, when the marriage was so near being consummated, must be a grievous disappointment, and a great vexation:

You shall build an house, and you shall not dwell therein ;
being, before it is quite finished, or however before he is got into it, carried captive, or obliged to flee to a distant place:

You shall plant a vineyard, and shall not gather the grapes thereof ;
or make it common, on the fourth year to eat the fruits of it, as Jarchi; which might not be done until sanctified and redeemed according to the law in (Leviticus 19:23–25) ; (See Gill on Deuteronomy 20:6).