Acts 21:26-27
21:26 Then Paul took the men the next day, and after he had purified himself along with them, he went to the temple and gave notice of the completion of the days of purification, when the sacrifice would be offered for each of them.
21:27 When the seven days were almost over, the Jews from the province of Asia who had seen him in the temple area stirred up the whole crowd and seized him,