Following are a number of back-translations as well as a sample translation for translators of Numbers 8:21:

• Kupsabiny: “That clan of Levi cleansed/washed themselves and washed their clothes, and then Aaron set them aside to give (them) to God. He did for those people the ceremony so as to cleanse (them).” (Source: Kupsabiny Back Translation)
• Newari: “The Levites purified themselves and washed their clothes. Then Aaron dedicated them before the LORD as a wave offering. Then he made atonement for them to purify them.” (Source: Newari Back Translation)
• Hiligaynon: “The descendants of Levi made- themselves -clean, and they washed their clothes. Then Aaron dedicated them in the presence of the LORD as a special offering, and Aaron made ceremonies in-order that they will-be-redeemed of their sins, and so-that they will-be-considered clean.” (Source: Hiligaynon Back Translation)
• English: “The descendants of Levi sprinkled themselves with water to symbolize that they had been freed/cleansed from the guilt of their sins, and they washed their clothes. Then Aaron brought them to the altar to present them to Yahweh, and he offered sacrifices to cleanse them from the guilt of their sins and cause them to become acceptable to Yahweh.” (Source: Translation for Translators)