Acts 21:26
Then Paul took the men and the next day, purifying himself with them, entered into the temple to signify the accomplishment of the days of purification until an offering should be offered for each one of them.
Acts 24:18
Whereupon certain Jews from Asia found me purified in the temple, neither with multitude, nor with tumult,
Numbers 6:13-20
This is, therefore, the law of the Nazarite, in the day in which their Nazariteship is fulfilled: they shall be brought unto the door of the tabernacle of the testimony;
Acts 21:24
them take, and purify thyself with them, and pay their expenses, that they may shave their heads, and all may know that those things, of which they were informed concerning thee, are nothing, but that thou thyself dost also walk orderly and keep the law.
1 Corinthians 9:20
And unto the Jews I became as a Jew, that I might gain the Jews; to those that are under the law, as under the law, that I might gain those that are under the law;