en_tn_condensed/jas/05/02.md

Your riches have rotted, and your clothes have become moth-eaten. Your gold and your silver have become tarnished

Earthly riches do not last nor do they have any eternal value. James speaks of these events as if they had already happened. Alternate translation: "Your riches will rot, and your clothes will be eaten by moths. Your gold and silver will become tarnished" (See: rc://en/ta/man/translate/figs-pastforfuture)

riches ... clothes ... gold ... silver

These things are mentioned as examples of things that are valuable to wealthy people.

have become tarnished ... their rust

These phrases are used here to describe how gold and silver are ruined. Alternate translation: "are ruined ... their ruined condition" or "are corroded ... their corrosion"