Shook out for shook, A.V. For this action of shaking his raiment, comp. Acts 13:51. It was in accordance with our Lord's direction in Matthew 10:14, where the same word ( ἐκτινάσσειν) is used. It is "much employed in medical language".
The idea seems to be having nothing henceforth in common with them. Your blood, etc. (see Ezekiel 33:4-9). St. Paul's keen sense of the perverseness of the Jews breaks out in his First Epistle to the Thessalonians (it.
14-16), written about this time. See hole to Matthew 10:5.