GOD'S WORD® Translation
The Levites performed the ceremonies to take away their sins and washed their clothes. Aaron presented them as an offering to the LORD and made peace with the LORD for them in order to make them clean.

American Standard Version
And the Levites purified themselves from sin, and they washed their clothes: and Aaron offered them for a wave-offering before Jehovah; and Aaron made atonement for them to cleanse them.

Berean Study Bible
The Levites purified themselves and washed their clothes, and Aaron presented them as a wave offering before the LORD. Aaron also made atonement for them to cleanse them.

Douay-Rheims Bible
And they were purified, and washed their garments. And Aaron lifted them up in the sight of the Lard, and prayed for them,

English Revised Version
And the Levites purified themselves from sin, and they washed their clothes; and Aaron offered them for a wave offering before the LORD; and Aaron made atonement for them to cleanse them.

King James Bible
And the Levites were purified, and they washed their clothes; and Aaron offered them as an offering before the LORD; and Aaron made an atonement for them to cleanse them.

World English Bible
The Levites purified themselves from sin, and they washed their clothes; and Aaron offered them for a wave offering before Yahweh; and Aaron made atonement for them to cleanse them.

Young's Literal Translation
And the Levites cleanse themselves, and wash their garments, and Aaron waveth them a wave-offering before Jehovah, and Aaron maketh atonement for them to cleanse them,

Numbers 8:21 Additional Translations ...