Matthew Poole and continuators on Acts 21:27

27 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,

Either, 1. after his coming, to Ierusalem, or rather 2. of his Vow; for 'tis thought that his Vow of Separation was but for Seven days: Or, 3. The Seven days of that Feast of Pentecost which he came unto.

Who were implacably set against him wheresoever he went, as Ch. 14.19. and 17.5. These Iews dwelt at Ephesus, and elsewhere, but were come to observe the Feast at Ierusalem.

By violence, and against Law.