“And when the seven days were almost ended, the Jews which were of Asia, when they saw him in the temple, stirred up all the people, and laid hands on him,”
King James Version (KJV)
21:27 And when the seven days were about to be accomplished - When after giving notice to the priests, they were entering upon the accomplishment of those days. It was toward the beginning of them that Paul was seized. The Jews that were from Asia - Some of those Jews who came from Asia to the feast.
Ac 21:27 When the seven days were almost ended. Seven days was an ordinary period of purification. For example, see Ex 29:37 Le 12:2 13:6 Nu 12:14. The Jews . . . of Asia. From the Roman province called Asia, of which Ephesus was the capital. As Paul had spent three years in that city, they knew him well. These Jews were watching Paul, had seen him in company with Trophimus, an Ephesian Greek, and when they saw Paul in the temple keeping the Nazarite vow, seized him and raised an outcry.