Acts 21:15-26
After these days we made ready and went up to Jerusalem. And some of the disciples from Caesare'a went with us, bringing us to the house of Mnason of Cyprus, an early disciple, with whom we should lodge. When we had come to Jerusalem, the brethren received us gladly. On the following day Paul went in with us to James; and all the elders were present.
After greeting them, he related one by one the things that God had done among the Gentiles through his ministry. And when they heard it, they glorified God. And they said to him, "You see, brother, how many thousands there are among the Jews of those who have believed; they are all zealous for the law, and they have been told about you that you teach all the Jews who are among the Gentiles to forsake Moses, telling them not to circumcise their children or observe the customs. What then is to be done? They will certainly hear that you have come. Do therefore what we tell you. We have four men who are under a vow; take these men and purify yourself along with them and pay their expenses, so that they may shave their heads. Thus all will know that there is nothing in what they have been told about you but that you yourself live in observance of the law. But as for the Gentiles who have believed, we have sent a letter with our judgment that they should abstain from what has been sacrificed to idols and from blood and from what is strangled and from unchastity."
Then Paul took the men, and the next day he purified himself with them and went into the temple, to give notice when the days of purification would be fulfilled and the offering presented for every one of them.