2 Chronicles 20:14-15 New International Version (NIV)
14 Then the Spirit of the Lord came on Jahaziel son of Zechariah, the son of Benaiah, the son of Jeiel, the son of Mattaniah, a Levite and descendant of Asaph, as he stood in the assembly.
15 He said: “Listen, King Jehoshaphat and all who live in Judah and Jerusalem! This is what the Lord says to you: ‘Do not be afraid or discouraged because of this vast army. For the battle is not yours, but God’s.