Acts 13:51

51So after they shook
The participle ἐκτιναξάμενοι (ektinaxamenoi) is taken temporally. It could also be translated as a participle of attendant circumstance (“So they shook…and went”).
the dust off their feet
Shaking the dust off their feet was a symbolic gesture commanded by Jesus to his disciples, Matt 10:14; Mark 6:11; Luke 9:5. It shows a group of people as culpable before God.
in protest against them, they went to Iconium.
Iconium was a city in Lycaonia about 90 mi (145 km) east southeast of Pisidian Antioch. It was the easternmost city of Phrygia.
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