Acts 21:22

20They, when they heard it, glorified God. They said to him, “You see, brother, how many thousands there are among the Jews of those who have believed, and they are all zealous for the law.

21They have been informed about you, that you teach all the Jews who are among the Gentiles to forsake Moses, telling them not to circumcise their children and not to walk after the customs.

22What then? The assembly must certainly meet, for they will hear that you have come.

23Therefore do what we tell you. We have four men who have taken a vow.

24Take them and purify yourself with them, and pay their expenses for them, that they may shave their heads. Then all will know that there is no truth in the things that they have been informed about you, but that you yourself also walk keeping the law.