Matthew 10:13

Verse 13. If the house be worthy. That is, if the family be worthy, or be willing to receive you as my disciples. Let your peace come upon it. That is, let the peace or happiness which you seek, or for which you pray, in saluting it, Lu 10:5 come upon it; or seek their peace and happiness by prayer, instruction, by remaining with them, and imparting to them the blessings of the gospel. But if it be not worthy, etc. If the family be unwilling to receive you; if they show themselves unfriendly to you and your message, let your peace return to you. This is a Hebrew mode of saying that your peace should not come upon it, Ps 35:13. It is a mode of speaking derived from bestowing a gift.