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

O our God, will You not judge them? For we are powerless against this great multitude which is coming against us. We do not know what to do, but our eyes are on You.”

He said, “Listen carefully, all [you people of] Judah, and you inhabitants of Jerusalem, and 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 need not fight in this battle; take your positions, stand and witness the salvation of the LORD who is with you, O Judah and Jerusalem. Do not fear or be dismayed; tomorrow go out against them, for the LORD is with you.’ ”

So they got up 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 and trust in the LORD your God and you will be established (secure). Believe and trust in His prophets and succeed.” When he had consulted with the people, he appointed those who sang to the LORD and those who praised Him in their holy (priestly) attire, as they went out before the army and said, “Praise and give thanks to the LORD, for His mercy and lovingkindness endure forever.”