'Shake Off the Dust' in the Bible

And whoever shall not receive you, nor hear your words, when ye depart from that house, or city, shake off the dust of your feet.

And whoever shall not receive you, nor hear you, when ye depart thence shake off the dust under your feet, for a testimony against them. Verily I say to you, It shall be more tolerable for Sodom and Gomorrah in the day of judgment, than for that city.