2 Bible Verses about Dust, Figurative Use

And whosoever shall not receive you, nor hear your words; when ye go out of that house or city, shake off the dust from your feet.

And they cast dust on their heads, and cried, weeping and mourning, saying, Alas, alas! The great city, wherein were made rich all that had ships in the sea, by reason of her costliness; for in one hour she is made desolate.