2 Chronicles 20:12, 15, 17, 20-21

O our God, will You not exercise judgment upon them? For we have no might to stand against this great company that is coming against us. We do not know what to do, but our eyes are upon You.

He said, Hearken, all Judah, you inhabitants of Jerusalem, and you King Jehoshaphat. The Lord says this to you: Be not afraid or dismayed at this great multitude; for the battle is not yours, but God's.

You shall not need to fight in this battle; take your positions, stand still, and see the deliverance of the Lord [Who is] with you, O Judah and Jerusalem. Fear not nor be dismayed. Tomorrow go out against them, for the Lord is with you.

And they rose early in the morning and went out into the Wilderness of Tekoa; and as they went out, Jehoshaphat stood and said, Hear me, O Judah, and you inhabitants of Jerusalem! Believe in the Lord your God and you shall be established; believe and remain steadfast to His prophets and you shall prosper. When he had consulted with the people, he appointed singers to sing to the Lord and praise Him in their holy [priestly] garments as they went out before the army, saying, Give thanks to the Lord, for His mercy and loving-kindness endure forever!