2 Kings 3:18

14 Then Elisha said, “As surely as the LORD of Hosts lives, before whom I stand, were it not for my regard for the presence of Jehoshaphat king of Judah, I would not look at you or acknowledge you.

15 But now, bring me a harpist.” And while the harpist played, the hand of the LORD came upon Elisha

16 and he said, “This is what the LORD says: ‘Dig this valley full of ditches.’

17 For the LORD says, ‘You will not see wind or rain, but the valley will be filled with water, and you will drink—you and your cattle and your animals.’

18 This is a simple matter in the sight of the LORD, and He will also deliver the Moabites into your hand.

19 And you shall attack every fortified city and every city of importance. You shall cut down every good tree, stop up every spring, and ruin every good field with stones.”

20 The next morning, at the time of the morning sacrifice, water suddenly flowed from the direction of Edom and filled the land.

21 Now all the Moabites had heard that the kings had come up to fight against them. So all who could bear arms, young and old, were summoned and stationed at the border.

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.

Read all of 2 Kings 3