2 Kings 3:21-23

New King James Version

²¹ 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 ^[a]gathered; and they stood at the border. ²² 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. ²³ And they said, “This is blood; the kings have surely struck swords and have killed one another; now therefore, Moab, to the spoil!”