'Cleanse' in the Bible

“Take the Levites from among the sons of Israel and cleanse them.

Then after that the Levites may go in to serve the tent of meeting. But you shall cleanse them and present them as a wave offering;

The Levites, too, purified themselves from sin and washed their clothes; and Aaron presented them as a wave offering before the Lord. Aaron also made atonement for them to cleanse them.