So the next day Paul took the men and purified himself along with them. Then he entered the temple to give notice of the date when their purification would be complete and the offering would be made for each of them.

Numbers 6:13
Now this is the law of the Nazirite when his time of separation is complete: He must be brought to the entrance to the Tent of Meeting,

Numbers 19:11
Whoever touches any dead body will be unclean for seven days.

John 11:55
Now the Jewish Passover was near, and many people went up from the country to Jerusalem to purify themselves before the Passover.

Acts 21:24
Take these men, purify yourself along with them, and pay their expenses so they can have their heads shaved. Then everyone will know that there is no truth to these rumors about you, but that you also live in obedience to the law.

Acts 24:18
At the time they found me in the temple, I was ceremonially clean and was not inciting a crowd or an uproar. But there are some Jews from the province of Asia

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 that an offering should be offered for every one of them.