Matthew Henry on 2 Chronicles 20:20-30
We have here the foregoing prayer answered and the foregoing promise performed, in the total overthrow of the enemies' forces and the triumph (for so it was rather than a victory) of Jehoshaphat's forces over them.
I. Never was army drawn out to the field of battle as Jehoshaphat's was. He had soldiers ready prepared for war (Ch2 17:18), but here is no notice taken of their military equipment, their swords or spears, their shields or bows. But Jehoshaphat took care, 1. That faith should be their armour. As they went forth, instead of calling them to handle their arms, and stand to them, to keep ranks, observe orders, and fight valiantly, he bade them believe in the Lord God and give credit t…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Chronicles 20:24
when Judah came toward the watchtower in the wilderness--Most probably the conical hill, Jebel Fereidis, or Frank Mountain, from the summit of which they obtained the first view of the scene of slaughter. Jehoshaphat and his people found the field strewed with dead bodies, so that they had not to fight at all, but rather to take possession of an immense booty, the collection of which occupied three days. On the fourth they set out on their return to Jerusalem in the same order and joyful mood as they came. The place where they mustered previous to departure was, from their public thanksgiving service, called, "The Valley of Berachah" ("benediction"), now Wady Bereikut.
Adam Clarke on 2 Chronicles 20:29
The Lord fought - "The Word of the Lord made war against the enemies of Israel." - Targum.
John Gill on 2 Chronicles 20:30
So the realm of Jehoshaphat was quiet,.... Both within and without; they were at peace among themselves, and none from abroad dared to molest them:
for his God gave him rest round about; from all his enemies; the Targum has it, the Word of his God; and so, in the preceding verse, the Word of the Lord fought; and in 2 Chronicles 20:28 the Word of the Lord made them rejoice.