John Gill
And many that believed,.... In Jesus Christ, whose name was spoken of with great respect, and which spread fear in every person: came; to the apostle: and confessed; their sins; and acknowledged what a wicked life they had led: and showed their deeds; their former evil deeds, which they had been guilty of; one copy reads, "their sins"; see Matthew 3:6.
Matthew Henry
We left Paul in his circuit visiting the churches (ch. xviii. 23), but we have not forgotten, nor has he, the promise he made to his friends at Ephesus, to return to them, and make some stay there; now this chapter shows us his performance of that promise, his coming to Ephesus, and his continuance there two years; we are here told, I. How he laboured there in the word and doctrine, how he taught...