Connecting Statement:

Yahweh continues telling Moses what the people must do every year.

must be cut off from his people

Being excluded is spoken of as being cut off. See how you translated this idea in Leviticus 7:20. AT: "must be excluded from his people" or "you must separate that person from his people" (See: rc://en/ta/man/translate/figs-metaphor and rc://en/ta/man/translate/figs-activepassive)