Acts 21:25-26

25But concerning [those of] the nations who have believed, we have written, deciding that they should [observe no such thing, only to] keep themselves both from things offered to idols, and from blood, and from things strangled, and from fornication.

26Then Paul, taking the men, on the next day, having been purified, entered with them into the temple, signifying the time the days of the purification would be fulfilled, until the offering was offered for every one of them.