Acts 21:25-26

25With regard to the Gentiles who have believed, we have written a letter containing our decision that they should keep themselves from food sacrificed to idols, from blood, from what is strangled, and from sexual immorality.”

26So the next day, Paul took the men, having purified himself along with them, and entered the temple, announcing the completion of the purification days when the offering would be made for each of them.