'Dust' in the Bible

And as for all those who do not welcome you, when you leave that city, shake the dust off your feet [breaking all ties with them] as a testimony against them [that they rejected My message].”

‘Even the dust of your city which clings to our feet we wipe off in protest against you [breaking all ties]; yet understand this, that the kingdom of God has come near [and you rejected it].’

Everyone who falls on that stone will be broken and shattered in pieces; and on whomever it falls, it will crush him.”