2 Bible Verses about Dust, Figurative Use

And whosoever may not receive you, nor hear your words, going out from that house or city, shake off the dust from your feet.

And they continued to cast dust upon their heads, and cry, weeping and mourning, saying, Alas, alas, the great city, in which all those having ships in the sea became rich from her costliness! that in one hour she is made desolate.