Bible verses about "dust" | Mace

¹⁴ if they should not receive you, nor mind your instructions: when ye depart out of that house, or city, shake off the pagan dust from your feet.

⁵ if any refuse to entertain you, when you leave that city, shake off the dust from your feet, as a sign of their being abandon'd.

²¹ is not the potter the master of his own clay, of the same mass to make one vessel for use and ornament, and another for a meaner purpose?