en_tn/lev/20/09.md

must surely be put to death

This can be translated in active form. Alternate translation: "you must surely put to death" (See: rc://en/ta/man/jit/figs-activepassive)

his blood is upon him

The word "blood" here is a metonym for the guilt of putting someone to a violent death. Alternate translation: "the guilt for his violent death is his alone" (See: rc://en/ta/man/jit/figs-metonymy)