2nd Chronicles 20:16

13 And all Judah were waiting before the Lord, with their little ones, their wives, and their children.

14 Then, before all the meeting, the spirit of the Lord came on Jahaziel, the son of Zechariah, son of Benaiah, son of Jeiel, son of Mattaniah, a Levite and one of the family of Asaph;

15 And he said, Give ear, O Judah, and you people of Jerusalem, and you, King Jehoshaphat: the Lord says to you, Have no fear and do not be troubled on account of this great army; for the fight is not yours but God's.

16 Go down against them tomorrow: see, they are coming up by the slope of Ziz; at the end of the valley, before the waste land of Jeruel, you will come face to face with them.

17 There will be no need for you to take up arms in this fight; put yourselves in position, and keep where you are, and you will see the salvation of the Lord with you, O Judah and Jerusalem: have no fear and do not be troubled: go out against them tomorrow, for the Lord is with you.

18 Then Jehoshaphat went down with his face to the earth, and all Judah and the people of Jerusalem gave worship to the Lord, falling down before him.

19 And the Levites, the children of the Kohathites and the Korahites, got to their feet and gave praise to the Lord, the God of Israel, with a loud voice.