Isaiah 18:5

For afore the harvest, when the bud is perfect, and the sour grape is ripening in the flower, he shall both cut off the sprigs with pruning hooks, and take away and cut down the branches.

Cross-reference

In Isaiah 17:11, the same harvest metaphor shows a planted crop becoming ruin—parallel judgment imagery of destroyed growth.

In Ezekiel 17:6-10, a vine is plucked up and withers—very similar pruning metaphor for divine judgment on a nation.

In Jeremiah 51:33, Babylon's harvest time is judgment—same harvest metaphor for divine retribution.