Here "the sword" represents death in battle, and "those whose hands use the sword" refers to enemies who kill them in battle. This can be stated in active form. Alternate translation: "God will cause them to die in battle" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-activepassive]])
Here "they" refers to the corpses of those who die in battle. Alternate translation: "jackals will eat their dead bodies" (See: [[rc://en/ta/man/translate/figs-explicit]])