Acts21chapter 21

James asks Paul to pay the costs for four men completing a Nazirite vow — a period of abstinence ended with sacrifices and the shaving of the head. Covering another man's offering was a recognized act of piety and generosity, and doing it publicly would show that Paul had not abandoned the Law himself.

The temple had a low stone barrier, the soreg, separating the outer court from the inner precincts, with warning notices in Greek and Latin. Two of those inscriptions have been found; they threaten death to any foreigner who passes, and Rome allowed the Jewish authorities to enforce it even on Roman citizens. The crowd's accusation — that Paul brought a Greek inside — was a capital charge.

Trophimus, whom they had seen with Paul in the city, was from Ephesus. Luke says plainly that they assumed the rest.

The Antonia fortress overlooked the temple courts from the northwest corner, with stairs running down into them, so the garrison could be inside a disturbance within moments. The tribune's guess that Paul was "the Egyptian" refers to a real messianic agitator who had led thousands into the desert a few years earlier and escaped when Roman troops broke up the movement; Josephus tells the story.