New Living Translation
Go with them to the Temple and join them in the purification ceremony, paying for them to have their heads ritually shaved. Then everyone will know that the rumors are all false and that you yourself observe the Jewish laws.

American Standard Version
these take, and purify thyself with them, and be at charges for them, that they may shave their heads: and all shall know that there is no truth in the things whereof they have been informed concerning thee; but that thou thyself also walkest orderly, keeping the law.

Berean Study Bible
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.

Douay-Rheims Bible
Take these, and sanctify thyself with them: and bestow on them, that they may shave their heads: and all will know that the things which they have heard of thee, are false; but that thou thyself also walkest keeping the law.

English Revised Version
these take, and purify thyself with them, and be at charges for them, that they may shave their heads: and all shall know that there is no truth in the things whereof they have been informed concerning thee; but that thou thyself also walkest orderly, keeping the law.

King James Bible
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.

World English Bible
Take them, and purify yourself with them, and pay their expenses for them, that they may shave their heads. Then all will know that there is no truth in the things that they have been informed about you, but that you yourself also walk keeping the law.

Young's Literal Translation
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.

Acts 21:24 Additional Translations ...