2 Chronicles 20:14-15

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; 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.