2 Kings 3:26

22 When they got up early in the morning, the sun was shining on the water, and it looked as red as blood to the Moabites across the way.

23 “This is blood!” they exclaimed. “The kings have clashed swords and slaughtered one another. Now to the plunder, Moab!”

24 But when the Moabites came to the camp of Israel, the Israelites rose up and attacked them, and they fled before them. So the Israelites invaded their land and struck down the Moabites.

25 They destroyed the cities, and each man threw stones on every good field until it was covered. They stopped up every spring and cut down every good tree. Only Kir-haraseth was left with stones in place, but men with slings surrounded it and attacked it as well.

26 When the king of Moab saw that the battle was too fierce for him, he took with him seven hundred swordsmen to break through to the king of Edom, but they could not prevail.

27 So he took his firstborn son, who was to succeed him, and offered him as a burnt offering on the city wall. And there was great fury against the Israelites, so they withdrew and returned to their own land.

Read all of 2 Kings 3