2 Chronicles 15:15

And he built fortified cities in Judah, since the land was quiet, and there was no one at war with him during those years, because Yahweh had given him rest.

and he went out to meet Asa and said to him, “Listen to me, Asa, and all Judah and Benjamin: Yahweh is with you when you are with Him. And if you seek Him, He will be found; but if you forsake Him, He will forsake you.

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

With all my heart I have sought You; Do not let me stray from Your commandments.