Acts 21:24
"We have four men here under a vow; associate yourself with them, purify yourself with them, and pay their expenses so that they may have their heads shaved; then every one will know that there is no truth in the rumors that they have heard about you; but that you yourself walk orderly obeying the law.
Acts 18:18
And Paul after remaining in Corinth some time longer, took leave of the brothers, and sailed away to Syria, accompanied by Priscilla and Aquila. As Paul was under a vow, he had his head shaved at Cenchrea.
Luke 17:10
"Even so, you also, after you have done all the things that are commanded you, should say, 'We are but slaves, we have only done what it was our duty to do.'"
Acts 21:26
Then Paul took the men, and after purifying himself with them next day, went into the temple to declare the fulfilment of the days of purification, until the offering was offered for every one of them.
Ephesians 1:6
and to the praise of his glorious grace which he graciously bestowed upon us in the Beloved.