The community must rescue the killer from the power of the avenger of blood

This means if the community judges that the death was an accident, then they must save the accused man from the relative who wants to kill him.

the one who was anointed with the holy oil

This can be stated in active form. Alternate translation: "the one you anointed with holy oil" (See: rc://en/ta/man/jit/figs-activepassive)