2 Kings 3:23 in the King James Version
And they said, This is blood: the kings are surely slain, and they have smitten one another: now therefore, Moab, to the spoil.
Context
22 They rose up early in the morning, and the sun shone on the water, and the Moabites saw the water opposite them as red as blood.
23 They said, “This is blood. The kings are surely destroyed, and they have struck each other. Now therefore, Moab, to the plunder!”
24 When they came to the camp of Israel, the Israelites rose up and struck the Moabites, so that they fled before them; and they went forward into the land attacking the Moabites.