Parallel passages: Mark 6:11; Luke 9:5 (the twelve); Luke 10:10, Luke 10:11 (the seventy). And whosoever shall not receive you—on your formal request as heralds of the kingdom—nor hear your words (Matthew 7:24, note), when (as, Revised Version, Luke 10:12, note) ye depart (go forth, Revised Version) out of.
At the moment of going out (cf. Luke 10:12), ἐξερχόμενοι ἔξω (Matthew 21:17; Acts 16:13), in this case finally. That house or (that, Revised Version) city. "The house," rightly further defined by "that" in English, comes in Matthew only; "that city" comes also in the parallel passage, Luke 9:5, and therefore belongs to the source used by St.
Matthew. Shake off the dust of your feet. Treating it as a heathen place, whose pollution must be shaken off. For the very dust from a heathen land was to be reckoned as polluting, since, as Rashi says on Talm.
Bab., 'Sabb.,' 15b (cf. Lightfoot, 'Hor. Hebr.,' in loc.), "It may be doubted, of all the dust of a heathen land, whether it were not from the sepulchre of the dead." (For the apostolic fulfilment of our Lord's injunction cf.
Acts 13:51 and Acts 18:6; see also Nehemiah 5:13.