Matthew Henry on Joshua 6:6-16

Wherever the ark went, the people attended it. God's ministers, by the trumpet of the everlasting gospel, which proclaims liberty and victory, must encourage the followers of Christ in their spiritual warfare. As promised deliverances must be expected in God's way, so they must be expected in his time. At last the people were to shout: they did so, and the walls fell. This was a shout of faith; they believed the walls of Jericho would fall. It was a shout of prayer; they cry to Heaven for help, and help came.