'Crumble' in the Bible

“Your memorable sayings are [worthless, merely] proverbs of ashes;Your defenses are defenses of [crumbling] clay.

All the host of heaven will be dissolved,And the skies will be rolled up like a scroll;All their hosts [the stars and the planets] will also wither awayAs a leaf withers from the vine,And as a fig withers from the fig tree.