The Hebrew verb rua means to raise a shout — whether a war cry in battle or a shout of joy in worship. The same word describes the battle cry that toppled Jericho's walls and the triumphal shout of worshipers before the King of kings.
Rua is the shout that changes things. At Jericho, Israel shouted (rua) and walls fell (Joshua 6:20) — demonstrating that God's strategy is not always military but sometimes is simply faithful obedience enacted in audible trust. The same shout characterizes the Psalms of praise: 'Shout for joy to God, all the earth!' (Psalm 100:1). This convergence of battle cry and worship shout is not accidental — in the Hebrew worldview, worship is spiritual warfare. The shout of God's people declares His victory before it is visibly realized. Numbers 23:21 describes Israel as a people 'before whom the shout of the King is heard' — their worship is a declaration of divine sovereignty over all enemies.