en_tn_lite_do_not_use/pro/11/28.md

will fall

This is an idiom. Here "fall" represents destruction or failure. Alternate translation: "will be destroyed" or "awaits a bad future" (See: rc://en/ta/man/translate/figs-idiom)

like the leaf, righteous people will flourish

"Leaf" represents growth and prosperity. Alternate translation: "righteous people will prosper in the same way a healthy green leaf grows" (See: rc://en/ta/man/translate/figs-simile)

righteous people will flourish

This means that righteous people will thrive or prosper.