This can be stated in active form. AT: "Yahweh has sent out a messenger" (See: [[rc://en/ta/man/translate/figs-activepassive]])
# to the nations, 'Gather together ... for battle.'
It is understood "Gather together" is the beginning of the messenger's message. AT: "to tell the nations, 'Gather together ... for battle.'" or "to the nations, and he will tell them, 'Gather together ... for battle.'" (See: [[rc://en/ta/man/translate/figs-ellipsis]])