This can be stated in active form. Alternate translation: "I, the Lord, will bless all the people living everywhere" (See: [[rc://en/ta/man/jit/figs-activepassive]])
Here "voice" stands for what God said. Alternate translation: "you have obeyed what I said" or "you have obeyed me" (See: [[rc://en/ta/man/jit/figs-metonymy]])