en_tn_condensed/num/08/07.md

to purify them

Here "them" refers to the Levites.

Sprinkle the water of atonement on them

"Sprinkle on them the water that symbolizes atonement"

Make them shave their entire body, wash their clothes, and purify themselves

Possible meanings are 1) Moses was to have the Levites shave, wash, and purify, or 2) Moses was to have the Levites purify themselves by shaving and washing, or Make them shave their entire body and wash their clothes; in this way they will purify themselves.