As soon as they began to sing, the enemy was overthrown. A panic seized the host of Ammonites and Moabites, and they beat down one another. It may well be that, when they heard the songs and shouts of joy, they thought that Israel had received reinforcements, and such was the case. The people of Israel had such reinforcements that they did not need to do any fighting themselves. Their faith was their victory, and their singing was the evidence of their faith. EVCO 458.1