en_tn_condensed/lev/22/03.md

throughout your generations

"from now on"

while he is unclean

A person who is not acceptable for God's purposes is spoken of as if the person were physically unclean. (See: rc://en/ta/man/translate/figs-metaphor)

that person must be cut off from before me

A priest no longer being able to serve Yahweh is spoken of as if that person had been cut off from Yahweh's presence, as one would cut a piece of cloth or cut a branch from a tree. This can be translated in active form. Alternate translation: "that person will no longer be able to serve as a priest" (See: rc://en/ta/man/translate/figs-metaphor and rc://en/ta/man/translate/figs-activepassive)