'Dust from Your Feet' in the Bible

"Oh, yes! Kings will be your foster fathers, and their queens will be your nursing mothers. They will bow to you with their faces to the ground, and lick the dust from your feet. Then you will know that I am the LORD; those who hope in me will not be disappointed.

And whoever does not welcome you or listen to your words, shake off the dust from your feet [as you] are going out of that house or [that] town.

And whatever place will not take you in and will not give ear to you, when you go away, put off the dust from your feet as a witness against them.

And whosoever will not receive you, when ye go out of that city, shake off the very dust from your feet for a testimony against them.