15 He said, "Listen, all you people of Judah and Jerusalem! Listen, King Jehoshaphat! This is what the Lord says: Do not be afraid! Don't be discouraged by this mighty army, for the battle is not yours, but God's. 16 Tomorrow, march out against them. You will find them coming up through the ascent of Ziz at the end of the valley that opens into the wilderness of Jeruel. 17 But you will not even need to fight. Take your positions; then stand still and watch the Lord 's victory. He is with you, O people of Judah and Jerusalem. Do not be afraid or discouraged. Go out against them tomorrow, for the Lord is with you!"

Matthew Henry's Commentary on 2 Chronicles 20:15-17

Commentary on 2 Chronicles 20:14-19

(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.