Acts 21:26
Then Paul took along the men on the next day, [and] [after he] had purified himself together with them, he entered into the temple [courts], announcing the completion of the days of purification until {the time} the offering would be presented on behalf of each one of them.
Acts 24:18
in which they found me purified in the temple [courts], not with a crowd or with a disturbance.
Numbers 6:13-20
" 'This [is] the regulation of the Nazirite for the day of the fulfilling of the days of his separation: one will bring him to the doorway of the tent of the assembly.
Acts 21:24
Take these [men] [and] purify yourself along with them and {pay their expenses} so that they can shave [their] heads, and everyone will know that [the things] which they had been informed about you are nothing, but you yourself also agree with observing the law.
1 Corinthians 9:20
I have become like a Jew to the Jews, in order that I may gain the Jews. To those under the law [I became] as under the law ([although I] myself am not under the law) in order that I may gain those under the law.