'Prepare For Battle' in the Bible

Goliath stood and called to Israel's troops, "Why do you come out to prepare for battle? Am I not the Philistine, and are you not the servants of Saul? Choose for yourselves a man so he may come down to me!

“With a large army he will stir up his power and his courage against the king of the South. The king of the South will prepare for battle with an extremely large and powerful army, but he will not succeed, because plots will be made against him.

And if the [war] bugle produces an indistinct sound, who will prepare himself for battle?