2 Chronicles 20:2-4

Then there came some that told Jehoshaphat, saying, There cometh a great multitude against thee from beyond the sea from Syria; and, behold, they are in Hazazon-tamar (the same is En-gedi). And Jehoshaphat feared, and set himself to seek unto Jehovah; and he proclaimed a fast throughout all Judah. And Judah gathered themselves together, to seek help of Jehovah: even out of all the cities of Judah they came to seek Jehovah.