Acts 21:26
Then Paul, taking the men, on the next day, having been purified with them, was entering into the temple, announcing the fulfillment of the days of purification, until the offering should be offered for each one of them.
Acts 24:18
amidst which they found me purified in the temple, neither with a multitude, nor with a tumult; but there were certain Jews from Asia,
Acts 21:24
taking these to yourself, be purified with them, and incur expense for them, that they may shave their heads; and all will know that there is nothing in those things of which they have been instructed concerning you; but that you yourself also are walking orderly, keeping the law.
1 Corinthians 9:20
And, to the Jews, I became as a Jew, that I might gain Jews; to those under law, as under law (not being myself under law), that I might gain those under law;