John Gill Commentary Deuteronomy 28:51

"and shall eat the fruit of thy cattle, and the fruit of thy ground, until thou be destroyed; that also shall not leave thee grain, new wine, or oil, the increase of thy cattle, or the young of thy flock, until they have caused thee to perish." — Deuteronomy 28:51 (ASV)

And he shall eat the fruit of your cattle
Larger and lesser, oxen and sheep, as their calves and lambs, and kids of the goat:

and the fruit of your land ;
their wheat, barley, figs, grapes, pomegranates, olives, and dates:

until you be destroyed ;
the land of Judea, and all the increase of it: this being before said, (Deuteronomy 28:31Deuteronomy 28:33) ; and here repeated, shows that the same should be fulfilled at different times, as by the Chaldeans, so by the Romans; whose nation, or army, with their general at the head of them, may be more especially here intended by "he", that should eat up their fruit until utter destruction was brought upon them:

which [also] shall not leave you [either] corn, wine, or oil, [or]
the increase of your kine, or flocks of your sheep, until he have
destroyed you ;
all being consumed by the Roman army. There is a promise and prophecy, that though this would be the case, as it has been, there shall be a time when it shall be so no more; see (Isaiah 62:8Isaiah 62:9) .