And they said, "This is blood; the kings have surely struck swords and have killed one another; now therefore, Moab, to the spoil!"
2 Kings 3:23
Surrounding context
3:22 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.
3:23 And they said, "This is blood; the kings have surely struck swords and have killed one another; now therefore, Moab, to the spoil!"
3:24 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.