These two lines give a similar image, which is repeated to emphasize that this will surely happen. (See: [[rc://en/ta/man/translate/figs-parallelism]])
This speaks of the wicked man growing weak and dying as if he were a grapevine dropping unripe grapes. Alternate translation: "Just like a grapevine drops its unripe grapes, so the wicked man will drop his strength" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This speaks of the wicked man growing weak and dying as if he were were an olive tree dropping its flowers. Alternate translation: "just like an olive tree loses its flowers, so the wicked man will lose his strength" (See: [[rc://en/ta/man/translate/figs-metaphor]])