But they shook off the dust from their feet against them and went to Iconium.
51. When they had shaken of the dust of their feet. We may also gather, even by the commandment of Christ, (Matthew 10:14; Luke 9:5; 10:11,) that this was a token of cursing among the Jews. For it is not to be thought that Christ meant to have his [disciples] use an unknown sign, forasmuch as it was his purpose to terrify the gross and professed condemners of his doctrine.
The design of this story being to vindicate the apostles, especially Paul (as he doth himself at large, Rom. 11), from the reflections of the Jews upon him for preaching the gospel to the Gentiles, it is here observed that he proceeded therein with all the caution imaginable, and upon due consideration, of which we have here an instance. I.
Commenting on Acts 13:42-52
Verse 51. But they shook off the dust, etc. . And came into Iconium. This was the capital of Lycaonia. It is now called Cogni, or Lonieh, and is the capital of Caramania. (b) "shook off the dust"