2 Chronicles 20:15
And he said, Hearken ye, all Judah, and ye inhabitants of Jerusalem, and thou king Jehoshaphat, Thus saith the Lord unto you, Be not afraid nor dismayed by reason of this great multitude; for the battle is not yours, but God’s. (2 Chronicles 20:15)
But God’s.
God identified Himself with His people. The enemies of Judah were God’s enemies, and the battle that was to follow was the Lord’s battle.