Acts 21:25-26

25But regarding the Gentiles who have believed, we have written a letter, having decided that they should avoid meat that has been sacrificed to idols and blood and what has been strangled and sexual immorality.”

26Then 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.