Mark 6:11

If anyone will not welcome you or listen to you, shake the dust off your feet when you leave that place, as a testimony against them.”

And whosoever 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 unto you, It shall be more tolerable for Sodom and Gomorrha in the day of judgment, than for that city.