Matthew 10:14, "Whoever does not receive you, nor heed your words, as you go out of that house or that city, shake the dust off your feet."
Mark 6:11, "Any place that does not receive you or listen to you, as you go out from there, shake the dust off the soles of your feet for a testimony against them."
Luke 9:5, "And as for those who do not receive you, as you go out from that city, shake the dust off your feet as a testimony against them."