Passage
and he said, “Listen, all Judah, and you inhabitants of Jerusalem, and you, king Jehoshaphat. Yahweh says to you, ‘Don’t be afraid, and don’t be dismayed because of this great multitude; for the battle is not yours, but God’s.
and he said, “Listen, all Judah, and you inhabitants of Jerusalem, and you, king Jehoshaphat. Yahweh says to you, ‘Don’t be afraid, and don’t be dismayed because of this great multitude; for the battle is not yours, but God’s.
2 Chronicles 20:13 All Judah stood before Yahweh, with their little ones, their wives, and their children.
2 Chronicles 20:14 Then Yahweh’s Spirit came on Jahaziel the son of Zechariah, the son of Benaiah, the son of Jeiel, the son of Mattaniah, the Levite, of the sons of Asaph, in the middle of the assembly;
2 Chronicles 20:15 and he said, “Listen, all Judah, and you inhabitants of Jerusalem, and you, king Jehoshaphat. Yahweh says to you, ‘Don’t be afraid, and don’t be dismayed because of this great multitude; for the battle is not yours, but God’s.
2 Chronicles 20:16 Tomorrow, go down against them. Behold, they are coming up by the ascent of Ziz. You will find them at the end of the valley, before the wilderness of Jeruel.
2 Chronicles 20:17 You will not need to fight this battle. Set yourselves, stand still, and see the salvation of Yahweh with you, O Judah and Jerusalem. Don’t be afraid, nor be dismayed. Go out against them tomorrow, for Yahweh is with you.’”
The verse centers on "said", "listen", "judah", "inhabitants", "jerusalem", "king", "jehoshaphat", and "yahweh". It is saying that the verse draws attention to "said" and "listen", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 14's "Then Yahweh s Spirit came on Jahaziel..." into verse 16's "Tomorrow go down against them Behold they...", so "said" and "listen" belong inside that flow. In 2 Chronicles context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "said" and "listen" with trust shaped by these words, not by a vague optimism outside the passage.