Acts 21:22-24

22What shall we do? They will certainly hear that you have come, 23so do what we tell you. There are four men with us who have made a vow. 24Take these men, join in their purification rites and pay their expenses, so that they can have their heads shaved. Then everyone will know there is no truth in these reports about you, but that you yourself are living in obedience to the law.