And whoever will not receive you, when you go out of that city, shake off the very dust from your feet for a testimony against them.…
The Jews were accustomed, on their return from heathen countries to the Holy Land, to shake off the dust from their feet at the frontier. This act signified a breaking away from all joint participation in the life of the idolatrous world. The Apostles were to act in the same way with reference to any Jewish cities which might reject in their person the Kingdom of God. The rejection of the gospel is not the rejection of a mere theory on which men may innocently entertain different opinions. It is the rejection of a message which, if faithfully received, reveals God, and subdues us to Him, and transforms us into His likeness. It is the refusal of the only remedy for moral evil which God has given to man. And notice that this remedy, being offered to us by men sent by God, may be rejected in rejecting their message or their preaching. The faults or idiosyncrasies of the preached are taken no account of by the Lord. It is one with what He says elsewhere, "He that heareth you, heareth Me, and he that despiseth you, despiseth Me, and he that dispiseth Me, despiseth Him that sent Me."
(M. F. Sadler, M. A.)
Parallel VersesKJV: And whosoever will not receive you, when ye go out of that city, shake off the very dust from your feet for a testimony against them.