Matthew 10:14-16

And whosoever shall not receive you, nor hear your words, as ye go forth out of that house or that city, shake off the dust of your feet. Verily I say unto you, It shall be more tolerable for the land of Sodom and Gomorrah in the day of judgment, than for that city. Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves.