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

Jehoshaphat was afraid and turned his attention to seek the LORD, and proclaimed a fast throughout all Judah.

O our God, will You not judge them? For we are powerless before this great multitude who are coming against us; nor do we know what to do, but our eyes are on You.”

and he said, “Listen, all Judah and the inhabitants of Jerusalem and King Jehoshaphat: thus says the LORD to you, ‘Do not fear or be dismayed because of this great multitude, for the battle is not yours but God’s.

When they began singing and praising, the LORD set ambushes against the sons of Ammon, Moab and Mount Seir, who had come against Judah; so they were routed.

So the kingdom of Jehoshaphat was at peace, for his God gave him rest on all sides.