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

Then Jehoshaphat was afraid and set his face to seek the LORD, and proclaimed a fast throughout all Judah.

O our God, will you not execute judgment on them? For we are powerless against this great horde that is coming against us. We do not know what to do, but our eyes are on you.”

And he said, “Listen, all Judah and inhabitants of Jerusalem and King Jehoshaphat: Thus says the LORD to you, ‘Do not be afraid and do not be dismayed at this great horde, for the battle is not yours but God’s.

And when they began to sing and praise, the LORD set an ambush against the men of Ammon, Moab, and Mount Seir, who had come against Judah, so that they were routed.

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