2 Kings 3:4-9, 16-20
4 Now Mesha king of Moab was a sheepbreeder, and he regularly paid the king of Israel one hundred thousand lambs and the wool of one hundred thousand rams. 5 But it happened, when Ahab died, that the king of Moab rebelled against the king of Israel.
6 So King Jehoram went out of Samaria at that time and mustered all Israel. 7 Then he went and sent to Jehoshaphat king of Judah, saying, “The king of Moab has rebelled against me. Will you go with me to fight against Moab?”
And he said, “I will go up; I am as you are, my people as your people, my horses as your horses.” 8 Then he said, “Which way shall we go up?”
And he answered, “By way of the Wilderness of Edom.”
9 So the king of Israel went with the king of Judah and the king of Edom, and they marched on that roundabout route seven days; and there was no water for the army, nor for the animals that followed them.
16 And he said, “Thus says the Lord: ‘Make this valley full of ditches.’ 17 For thus says the Lord: ‘You shall not see wind, nor shall you see rain; yet that valley shall be filled with water, so that you, your cattle, and your animals may drink.’ 18 And this is a simple matter in the sight of the Lord; He will also deliver the Moabites into your hand. 19 Also you shall attack every fortified city and every choice city, and shall cut down every good tree, and stop up every spring of water, and ruin every good piece of land with stones.”
20 Now it happened in the morning, when the grain offering was offered, that suddenly water came by way of Edom, and the land was filled with water.