Matthew 10:13-14

If [the family living in] the house is worthy [welcoming you and your message], give it your [blessing of] peace [that is, a blessing of well-being and prosperity, the favor of God]. But if it is not worthy, take back your blessing of peace. Whoever does not welcome you, nor listen to your message, as you leave that house or city, shake the dust [of it] off your feet [in contempt, breaking all ties]. [Mark 6:11; Acts 13:51]