Acts 21:26
Then the next day, Paul took the men, having purified himself along with them, and entered the temple, announcing the completion of the purification days when the offering for each of them would be made.
Acts 24:18
and while I was doing this, some Jews from Asia found me ritually purified in the temple, without a crowd and without any uproar.
Numbers 6:13-20
“This is the law of the Nazirite: On the day his time of consecration is completed, he must be brought to the entrance to the tent of meeting.
Acts 21:24
Take these men, purify yourself along with them, and pay for them to get their heads shaved. Then everyone will know that what they were told about you amounts to nothing, but that you yourself are also careful about observing the law.
1 Corinthians 9:20
To the Jews I became like a Jew, to win Jews; to those under the law, like one under the law—though I myself am not under the law