Acts 21:26
Then Paul took the men along with him and on the next day went into the temple with them, purified, and announced the time when the purification would be completed, when the sacrifice for each one of them could be offered.
Acts 24:18
While I was performing these duties they found me just as I had completed the rites of my purification in the temple; however, there was no crowd with me and no disturbance at all.
Acts 21:24
Take them along with you, purify yourself with them, and bear the expense for them of having their heads shaved. Then everybody will know that none of those things they have been told about you are so, but that you yourself are living as a constant observer of the law.
1 Corinthians 9:20
To the Jews I have become like a Jew for the winning of Jews; to men under the law, like one under the law, though I am not under the law myself, to win the men under the law;