(Read 2 Chronicles 20:14-19)
The Spirit of prophecy came upon a Levite in the midst of the congregation. The Spirit, like the wind, blows where and on whom He listeth. He encouraged them to trust in God. Let the Christian soldier go out against his spiritual enemies, and the God of peace will make him more than a conqueror. Our trials will prove our gain. The advantage will be all our own, but the whole glory must be given to God..
For a more detailed summary select the link below.
2 Chronicles 20 Bible Commentary – Matthew Henry (concise) (christianity.com)
2 Chronicles 20:17
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.’”