2 Chronicles 20:14

10 And now, here are the men of Ammon, Moab, and Mount Seir, whom You did not let Israel invade when they came out of the land of Egypt; but Israel turned away from them and did not destroy them.

11 See how they are repaying us by coming to drive us out of the possession that You gave us as an inheritance.

12 Our God, will You not judge them? For we are powerless before this vast army that comes against us. We do not know what to do, but our eyes are upon You.”

13 Meanwhile all the men of Judah, with their wives and children and little ones, were standing before the LORD.

14 Then the Spirit of the LORD came upon Jahaziel son of Zechariah, the son of Benaiah, the son of Jeiel, the son of Mattaniah, a Levite from Asaph’s descendants, as he stood in the midst of the assembly.

15 And he said, “Listen, all you people of Judah and Jerusalem! Listen, King Jehoshaphat! This is what the LORD says: ‘Do not be afraid or discouraged because of this vast army, for the battle does not belong to you, but to God.

16 Tomorrow you are to march down against them. You will see them coming up the Ascent of Ziz, and you will find them at the end of the valley facing the Wilderness of Jeruel.

17 You need not fight this battle. Take up your positions, stand firm, and see the salvation of the LORD on your behalf, O Judah and Jerusalem. Do not be afraid or discouraged. Go out and face them tomorrow, for the LORD is with you.’”

18 Then Jehoshaphat bowed facedown, and all the people of Judah and Jerusalem fell down before the LORD to worship Him.

Read all of 2 Chronicles 20