'Dust' in the Bible

And as many as receive you not, when ye depart from that city, shake off the dust from your feet for a testimony against them.

Even the dust from your city, that cleaveth to our feet, we wipe off against you: nevertheless know this, that the kingdom of God is come nigh.

Every one that falleth on that stone shall be broken to pieces; but on whomsoever it shall fall, it will scatter him as dust.