2 Chronicles 20:20,21

Observe, the weapons of Jehoshaphat were faith, and dependence on the Lord. Whether the company with the king had other weapons with them is not said: but he went forth depending upon the Lord; and he begun the preparation for battle with a song of victory. So should all the soldiers of Jesus go forth. For it is in his strength they fight: and the issue is not doubtful. The fight is in fact already over; Christ hath conquered: and his people overcome by his blood.