Acts 21:24

Take them, and join with them in their vow of abstinence, and pay their expenses, in order that they may shave their heads; and all will know that the things which they have heard reported of you are nothing; but that you yourself also walk orderly, and keep the law.

Acts 21:26

Then Paul took the men, and, on the following day, joining in their vow of abstinence, he entered the temple, and gave notice when the days of abstinence would be completed, at which time an offering should be made for each of them.

Acts 24:18

While engaged in these things, certain Jews from Asia found me fulfilling my vow of abstinence in the temple, not with a multitude, nor with tumult.

Acts 18:18

And Paul, having remained many days longer, took leave of the brethren, and sailed to Syria, and with him Priscilla and Aquila, having shorn his head in Cenchrea; for he had a vow.

John 3:25

There arose, therefore, a dispute between some of John's disciples and a Jew, about purification.

John 11:55

And the passover of the Jews was near; and many went up from the country to Jerusalem, before the passover, to purify themselves.

1 Corinthians 9:20

And to the Jews, I became as a Jew, that I might gain the Jews: to those who are under law, as under law, (not being myself under law,) that I might gain those who are under law;

Galatians 2:12

For, before certain persons came from James, he ate- with the Gentiles: but, when they had come, he withdrew, and separated himself, because he feared those who were of the circumcision.

Hebrews 9:10-14

since he relies only on meats and drinks and various immersions, ordinances in deed of the flesh, which were imposed till the time of reformation.

Treasury of Scripture Knowledge

Summary

Them take, and purify thyself with them, and be at charges with them, that they may shave their heads: and all may know that those things, whereof they were informed concerning thee, are nothing; but that thou thyself also walkest orderly, and keepest the law.

That they

General references

Bible References

And purify

Acts 21:26
Then Paul took the men, and, on the following day, joining in their vow of abstinence, he entered the temple, and gave notice when the days of abstinence would be completed, at which time an offering should be made for each of them.
Acts 24:18
While engaged in these things, certain Jews from Asia found me fulfilling my vow of abstinence in the temple, not with a multitude, nor with tumult.
John 3:25
There arose, therefore, a dispute between some of John's disciples and a Jew, about purification.
Hebrews 9:10
since he relies only on meats and drinks and various immersions, ordinances in deed of the flesh, which were imposed till the time of reformation.

That they

Acts 18:18
And Paul, having remained many days longer, took leave of the brethren, and sailed to Syria, and with him Priscilla and Aquila, having shorn his head in Cenchrea; for he had a vow.

But

1 Corinthians 9:20
And to the Jews, I became as a Jew, that I might gain the Jews: to those who are under law, as under law, (not being myself under law,) that I might gain those who are under law;
Galatians 2:12
For, before certain persons came from James, he ate- with the Gentiles: but, when they had come, he withdrew, and separated himself, because he feared those who were of the circumcision.

General references

Mark 7:5
then the Pharisees and the scribes asked him: Why do your disciples not walk according to the tradition of the elders, but eat bread with unwashed hands?