Acts 21:27

And when the seven days were almost ended - Greek: as the seven days were about to be fulfilled - ἔμελλον συντελεῖσθαι emellon sunteleisthai. The seven days which were to complete the observance of the vow, Acts 21:26. Perhaps the whole observance in this case was intended to be but seven days, as the time of such a vow was voluntary. The translation, “were almost ended,” is not quite correct. The Greek implies no more than that the period of the seven days was about to be accomplished, without implying that it was near the close of them when he was seized. By comparing the following places, Acts 21:18, Acts 21:26; Acts 22:30; Acts 23:12, Acts 23:32; Acts 24:1, Acts 24:11, it appears that the time of his seizure must have been near the beginning of those days (Doddridge).

The Jews which were of Asia - Who resided in Asia Minor, but who had come up to Jerusalem for purposes of worship. Compare the notes on Acts 2.