2 Chronicles 20:15

15 "Pay attention, all of Judah, every inhabitant of Jerusalem, and King Jehoshaphat," Jahaziel said. "This is what the LORD says to you: Don't be afraid or discouraged by this great army because the battle isn't yours. It belongs to God!

2 Chronicles 20:15 Meaning and Commentary

2 Chronicles 20:15

And he said, hearken ye, all Judah, and ye inhabitants of
Jerusalem, and thou King Jehoshaphat
There is a climax or gradation in these words rising from the lowest to the highest; from the people of the cities in the country, to the inhabitants of Jerusalem the metropolis, and from thence to the king the supreme governor: thus saith the Lord unto you, be not afraid, nor dismayed, by reason of
this great multitude;
whose numbers were discouraging to the king, and he had taken notice of them, which this respects: for the battle is not your's, but God's:
the cause was his, and he would espouse and maintain it; not they, but he, would fight the battle, and therefore they had nothing to fear.

2 Chronicles 20:15 In-Context

13 All Judah was standing before the LORD, even their little ones, wives, and children.

14 Then the LORD's spirit came upon Jahaziel son of Zechariah son of Benaiah son of Jeiel son of Mattaniah, a Levite of the line of Asaph, as he stood in the middle of the assembly.

15 "Pay attention, all of Judah, every inhabitant of Jerusalem, and King Jehoshaphat," Jahaziel said. "This is what the LORD says to you: Don't be afraid or discouraged by this great army because the battle isn't yours. It belongs to God!

16 March out against them tomorrow. Since they will be coming through the Ziz pass, meet them at the end of the valley that opens into the Jeruel wilderness.

17 You don't need to fight this battle. Just take your places, stand ready, and watch how the LORD, who is with you, will deliver you, Judah and Jerusalem. Don't be afraid or discouraged! Go out tomorrow and face them. The LORD will be with you."