They came to Jerusalem with harps and lyres and trumpets, to the house of the LORD.
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.
Commenting on 2 Chronicles 20:20-30
And they came to Jerusalem with psalteries, and harps, and trumpets,.... The three principal instruments of music used in singing the praises of God; these they played upon as they came to the city, and entered it, and passed through it: unto the house of the Lord; the temple, there to offer praise and thanksgiving again.
2Ch 20:26-28 On the fourth day the men of Judah gathered themselves together, to give thanks to God the Lord for this blessing, in a valley which thence received the name בּרכה עמק (valley of blessing), and which cannot have been far from the battle-field.
Commenting on 2 Chronicles 20:26-28