Your riches are corrupted
Either through disuse of them; and so the phrase is expressive of their tenaciousness, withholding that from themselves and others which is meet, and which is keeping riches for the owners thereof, to their hurt; or these are corrupted, and are corruptible things, fading and perishing, and will stand in no stead in the day of wrath, and therefore it is great weakness to put any trust and confidence in them:
and your garments are moth eaten;
being neither wore by themselves, nor put upon the backs of others, as they should, but laid up in wardrobes, or in chests and coffers, and so became the repast of moths, and now good for nothing.