2 Chronicles 20:15

15 He said, "Listen, all Y'hudah, you who live in Yerushalayim and King Y'hoshafat: here is what ADONAI is saying to you: 'Don't be afraid or distressed by this great horde; for the battle is not yours, but God's.

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 Y'hudah stood before ADONAI with their little ones, their wives and their children.

14 Then, in the middle of the assembly, the Spirit of ADONAI came upon Yachzi'el the son of Z'kharyahu, the son of B'nayah, the son of Ye'i'el, the son of Matanyah the Levi, from the descendants of Asaf.

15 He said, "Listen, all Y'hudah, you who live in Yerushalayim and King Y'hoshafat: here is what ADONAI is saying to you: 'Don't be afraid or distressed by this great horde; for the battle is not yours, but God's.

16 Tomorrow, go down against them. They will be coming up by the ascent of Tzitz, and you will find them at the end of the vadi, before the Yeru'el Desert.

17 You won't even need to fight this battle! Just take your positions, Y'hudah and Yerushalayim, stand still, and watch how ADONAI will deliver you! Don't be afraid or distressed; tomorrow, go out against them; for ADONAI is with you.'"