en_tn/rev/09/14.md

The voice said

The voice refers to the speaker. Alternate translation: "The speaker said" (See: rc://en/ta/man/translate/figs-synecdoche)

The four angels who had been prepared for ... that year, were released

This can be stated with an active form. Alternate translation: "The angel released the four angels who had been prepared for ... that year" (See: rc://en/ta/man/translate/figs-activepassive)