2 Chronicles 20:15

15 He said, "Listen to me, King Jehoshaphat and all you people living in Judah and Jerusalem. The Lord says this to you: 'Don't be afraid or discouraged because of this large army. The battle is not your battle, it is 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 the men of Judah stood before the Lord with their babies, wives, and children.

14 Then the Spirit of the Lord entered Jahaziel. (Jahaziel was Zechariah's son. Zechariah was Benaiah's son. Benaiah was Jeiel's son, and Jeiel was Mattaniah's son.) Jahaziel, a Levite and a descendant of Asaph, stood up in the meeting.

15 He said, "Listen to me, King Jehoshaphat and all you people living in Judah and Jerusalem. The Lord says this to you: 'Don't be afraid or discouraged because of this large army. The battle is not your battle, it is God's.

16 Tomorrow go down there and fight those people. They will come up through the Pass of Ziz. You will find them at the end of the ravine that leads to the Desert of Jeruel.

17 You won't need to fight in this battle. Just stand strong in your places, and you will see the Lord save you. Judah and Jerusalem, don't be afraid or discouraged, because the Lord is with you. So go out against those people tomorrow.'"