2 Chr 20:14-20 : 14 Then the Spirit of Yahweh came on Jahaziel the son of Zechariah, the son of Benaiah, the son of Jeiel, the son of Mattaniah, the Levite, of the sons of Asaph, in the midst of the assembly;
15 and he said, "Listen, all Judah, and you inhabitants of Jerusalem, and you king Jehoshaphat. Thus says Yahweh to you, 'Don't be afraid, neither be dismayed by reason of this great multitude; for the battle is not yours, but God's.
16 Tomorrow go down against them. Behold, they are coming up by the ascent of Ziz. You shall find them at the end of the valley, before the wilderness of Jeruel.
17 You will not need to fight this battle. Set yourselves, stand still, and see the salvation of Yahweh with you, O Judah and Jerusalem. Don't be afraid, nor be dismayed. Go out against them tomorrow, for Yahweh is with you.'"
18 Jehoshaphat bowed his head with his face to the ground; and all Judah and the inhabitants of Jerusalem fell down before Yahweh, worshipping Yahweh.
19 The Levites, of the children of the Kohathites and of the children of the Korahites, stood up to praise Yahweh, the God of Israel, with an exceeding loud voice.
20 They rose early in the morning, and went forth into the wilderness of Tekoa: and as they went forth, Jehoshaphat stood and said, "Listen to me, Judah, and you inhabitants of Jerusalem! Believe in Yahweh your God, so you shall be established! Believe his prophets, so you shall prosper."