2 Chronicles 20:15, 17

He said, “Listen, all you people of Judah and Jerusalem! Listen, King Jehoshaphat! This is what the LORD says: Do not be afraid! Don’t be discouraged by this mighty army, for the battle is not yours, but God’s.

But you will not even need to fight. Take your positions; then stand still and watch the LORD’s victory. He is with you, O people of Judah and Jerusalem. Do not be afraid or discouraged. Go out against them tomorrow, for the LORD is with you!”