Acts 21:26
Then Paul, having taken the men, on the following day, with them having purified himself, was entering into the temple, announcing the fulfilment of the days of the purification, till the offering was offered for each one of them.
Acts 24:18
in which certain Jews from Asia did find me purified in the temple, not with multitude, nor with tumult,
Numbers 6:13-20
And this is the law of the Nazarite; in the day of the fulness of the days of his separation doth one bring him in unto the opening of the tent of meeting,
Acts 21:24
these having taken, be purified with them, and be at expence with them, that they may shave the head, and all may know that the things of which they have been instructed concerning thee are nothing, but thou dost walk -- thyself also -- the law keeping.
1 Corinthians 9:20
and I became to the Jews as a Jew, that Jews I might gain; to those under law as under law, that those under law I might gain;