II Chronicles 20:3, 12, 15, 22, 30

And Jehoshaphat feared, and set himself to seek the LORD, and proclaimed a fast throughout all Judah.

O our God, will You not judge them? For we have no power against this great multitude that is coming against us; nor do we know what to do, but our eyes are upon You.”

And he said, “Listen, all you of Judah and you inhabitants of Jerusalem, and you, King Jehoshaphat! Thus says the LORD to you: ‘Do not be afraid nor dismayed because of this great multitude, for the battle is not yours, but God’s.

Now when they began to sing and to praise, the LORD set ambushes against the people of Ammon, Moab, and Mount Seir, who had come against Judah; and they were defeated.

Then the realm of Jehoshaphat was quiet, for his God gave him rest all around.