For they had seen before with him in the city
Not of Ephesus, but of Jerusalem:
Trophimus an Ephesian;
the same that is mentioned in ( Acts 20:4 ) whom these Jews of Asia, and who very probably were inhabitants of Ephesus, knew very well to be a Gentile:
whom they supposed Paul had brought into the temple;
for seeing him walk with the apostle very familiarly through the streets of Jerusalem, they concluded from thence, that he took him with him into the temple, which was a very rash and ill grounded conclusion; and which shows the malignity and virulence of their minds, and how ready they were to make use of any opportunity, and take up any occasion against him, even a bare surmise, and which had no show of probability in it; for it can never be thought, that while Paul was using methods to remove the prejudices of the Jews against him, he should take such a step as this, to introduce a Gentile into the holy place, which he knew was unlawful, and would greatly irritate and provoke them.