II Kings 3:20-27

Now it happened in the morning, when the grain offering was offered, that suddenly water came by way of Edom, and the land was filled with water. And when all the Moabites heard that the kings had come up to fight against them, all who were able to bear arms and older were gathered; and they stood at the border. Then they rose up early in the morning, and the sun was shining on the water; and the Moabites saw the water on the other side as red as blood. And they said, “This is blood; the kings have surely struck swords and have killed one another; now therefore, Moab, to the spoil!” So when they came to the camp of Israel, Israel rose up and attacked the Moabites, so that they fled before them; and they entered their land, killing the Moabites. Then they destroyed the cities, and each man threw a stone on every good piece of land and filled it; and they stopped up all the springs of water and cut down all the good trees. But they left the stones of Kir Haraseth intact. However the slingers surrounded and attacked it. And when the king of Moab saw that the battle was too fierce for him, he took with him seven hundred men who drew swords, to break through to the king of Edom, but they could not. Then he took his eldest son who would have reigned in his place, and offered him as a burnt offering upon the wall; and there was great indignation against Israel. So they departed from him and returned to their own land.