1 Now Jehoram the son of Ahab began to reign over Israel in Samaria the eighteenth year of Jehoshaphat king of Judah, and reigned twelve years. 2 And he wrought evil in the sight of the LORD; but not like his father, and like his mother: for he put away the image of Baal that his father had made. 3 Nevertheless he cleaved unto the sins of Jeroboam the son of Nebat, which made Israel to sin; he departed not therefrom. 4 And Mesha king of Moab was a sheepmaster, and rendered unto the king of Israel an hundred thousand lambs, and an hundred thousand rams, with the wool. 5 But it came to pass, when Ahab was dead, that the king of Moab rebelled against the king of Israel. 6 And king Jehoram went out of Samaria the same time, and numbered all Israel. 7 And he went and sent to Jehoshaphat the king of Judah, saying, The king of Moab hath rebelled against me: wilt thou go with me against Moab to battle? And he said, I will go up: I am as thou art, my people as thy people, and my horses as thy horses. 8 And he said, Which way shall we go up? And he answered, The way through the wilderness of Edom. 9 So the king of Israel went, and the king of Judah, and the king of Edom: and they fetched a compass of seven days' journey: and there was no water for the host, and for the cattle that followed them. 10 And the king of Israel said, Alas! that the LORD hath called these three kings together, to deliver them into the hand of Moab! 11 But Jehoshaphat said, Is there not here a prophet of the LORD, that we may inquire of the LORD by him? And one of the king of Israel's servants answered and said, Here is Elisha the son of Shaphat, which poured water on the hands of Elijah. 12 And Jehoshaphat said, The word of the LORD is with him. So the king of Israel and Jehoshaphat and the king of Edom went down to him. 13 And Elisha said unto the king of Israel, What have I to do with thee? get thee to the prophets of thy father, and to the prophets of thy mother. And the king of Israel said unto him, Nay: for the LORD hath called these three kings together, to deliver them into the hand of Moab. 14 And Elisha said, As the LORD of hosts liveth, before whom I stand, surely, were it not that I regard the presence of Jehoshaphat the king of Judah, I would not look toward thee, nor see thee. 15 But now bring me a minstrel. And it came to pass, when the minstrel played, that the hand of the LORD came upon him. 16 And he said, Thus saith the LORD, Make this valley full of ditches. 17 For thus saith the LORD, Ye shall not see wind, neither shall ye see rain; yet that valley shall be filled with water, that ye may drink, both ye, and your cattle, and your beasts. 18 And this is but a light thing in the sight of the LORD: he will deliver the Moabites also into your hand. 19 And ye shall smite every fenced city, and every choice city, and shall fell every good tree, and stop all wells of water, and mar every good piece of land with stones. 20 And it came to pass in the morning, when the meat offering was offered, that, behold, there came water by the way of Edom, and the country was filled with water. 21 And when all the Moabites heard that the kings were come up to fight against them, they gathered all that were able to put on armour, and upward, and stood in the border. 22 And they rose up early in the morning, and the sun shone upon the water, and the Moabites saw the water on the other side as red as blood: 23 And they said, This is blood: the kings are surely slain, and they have smitten one another: now therefore, Moab, to the spoil. 24 And when they came to the camp of Israel, the Israelites rose up and smote the Moabites, so that they fled before them: but they went forward smiting the Moabites, even in their country. 25 And they beat down the cities, and on every good piece of land cast every man his stone, and filled it; and they stopped all the wells of water, and felled all the good trees: only in Kir-haraseth left they the stones thereof; howbeit the slingers went about it, and smote it. 26 And when the king of Moab saw that the battle was too sore for him, he took with him seven hundred men that drew swords, to break through even unto the king of Edom: but they could not. 27 Then he took his eldest son that should have reigned in his stead, and offered him for a burnt offering upon the wall. And there was great indignation against Israel: and they departed from him, and returned to their own land.
[AD 373] Ephrem the Syrian on 2 Kings 3:9-14
After the death of Ahab, his son Ahaziah died too, and since he had no children, his brother Jehoram took his place. Therefore the Scripture reports that he moved with his army against the king of Moab. He went to war because Mesha, king of Moab, had refused to pay his tribute to the kings of Israel and had not paid both Hezekiah and Jehoram, that is, [he had not paid] one hundred thousand fat lambs and one hundred thousand unshorn rams. The word noqdo, which the Scripture mentions here, derives from Hebrew and can be translated as “king of the shepherds of rams,” that is, he reared huge herds of them. So Jehoram, who had resolved to assert the rights that his brother had renounced, summoned the kings of the inhabitants of Judea and Edom and marched with them through the territories of the children of Moab. But they found themselves on a barren and arid land, and they had no water for the army. The three kings went to see Elisha, following the advice of righteous Jehoshaphat, and implored him to rescue the suffering people, who were overwhelmed with thirst. The prophet protested and harshly reproached Jehoram but was pleased with Jehoshaphat and gave him hope of salvation. At the same time, he promised that through his mediation, he and his companions would soon obtain the victory through the agency of the Lord.

[AD 373] Ephrem the Syrian on 2 Kings 3:15
The Scripture mentions a musical instrument that produces sounds, or a harp, as the Hebrew says, so that, thanks to the sound of its music, all the soldiers might be assembled around it and might understand when they were summoned to destroy their enemies, and there might be evident testimonies of [Elisha’s] words. In this way, when the miracle occurred, they could not attribute it to Baal or the idols they worshiped. Indeed, there were numerous idolaters in the army.

[AD 373] Ephrem the Syrian on 2 Kings 3:16
“The harpist played, and the water flowed to the bed of the streams.” Through this figure the voice of Christ is conveniently foreshadowed, because he kept the harp of the spirit on the cross. Indeed, our Lord cried twice and gave up his spirit with a loud voice. And immediately the pagan centurion gave glory to the Lord, and in this manner the conversion of the Gentiles was clearly highlighted. After the Christ had brought to perfection on the wood of the cross the new glory of our Savior, the sources were immediately opened and rivers of living water flowed on the nations of the Gentiles, who are symbolized by the “wadi,” as Jesus had said before his passion: “Let the one who believes in me drink. As the Scripture has said, ‘Out of the believer’s heart shall flow rivers of living water.’ ” In this way the word of the prophet might be fulfilled: He who has played the harp will play for the Gentiles in the name of the Lord.

[AD 373] Ephrem the Syrian on 2 Kings 3:22-23
“The kings fought together and killed one another.” After the water had come and the armies of Jehoshaphat and his allied kings had drunk their fill, the Moabites, who had seen that the water was red, said this. But they were wrong, because the color of the water had become red on account of the coming of the sun that oppressed them. When they saw the stream flow, they did not think that water was actually flowing in it, because rain had not fallen in all those days. Consequently they took for granted that no source of water could exist in that dried and scorched region. Therefore they thought that the gods of their homeland had caused the kings and their armies to attack and destroy one another. Indeed, they were easily inclined to religious dissensions. They believed that what they saw flowing in the stream was the blood from the carnage of battle.

[AD 373] Ephrem the Syrian on 2 Kings 3:24
When the Moabites came to plunder the camp, they convinced themselves that its ruins had been abandoned by their guards. Instead, Jehoshaphat and the kings with him suddenly rose up with drawn swords when they realized that their enemies were approaching and almost upon them. But the Moabites did not persist in their attack. They turned around and ran away because they had come unarmed. They had not come to fight, but to plunder. Therefore they scattered the army of their enemies by simply turning their weapons against them. Then they destroyed and laid waste the land bordering [the Moabites]. And finally, like an overflowing stream, they rushed in to attack Moab, cutting down their trees according to Elisha’s order, stopping up the flowing springs, destroying the villages, and demolishing all their houses until they brought down their walls. They surrounded and demolished their fortresses, that is, knocked down the walls and scattered the rubble of the demolition.

[AD 1781] Richard Challoner on 2 Kings 3:25
Brick walls only remained: It was the proper name of the capital city of the Moabites. In Hebrew, Kir-Haraseth.
[AD 373] Ephrem the Syrian on 2 Kings 3:26-27
Therefore Mesha, who had lost all his hope in his armies, made an about-face to ask the gods for help, because he had seen that no human being could help him. Certain wise men of his country said to him that it was necessary to implore the mercy of the God of Israel by means of an extraordinary sacrifice, for exactly the same reason which Abraham, the father of the Israelites, had made his offering, which had been quite pleasing to God, according to the tradition that is generally renowned among the Canaanites. But the power and the strength of God had already been recognized by all with great admiration for what he had done before all the Moabites. Indeed, no one but him had made the water flow on his people in the desert of Edom, and they had never heard of or known another God who granted his worshipers greater benefits. Therefore the king, who could not deny the miracle that he had seen with his own eyes, did not want to be deprived of sufficient aid in the difficulties that encircled him. He was confirmed [in his hope] and abandoned the worship of idols by taking refuge in the powerful God who had created a new sea in the desert. Therefore he was invited by the word of the wise men and nobles of Moab to make a great sacrifice and to offer his firstborn child, the pillar of his house and the hope of his kingdom, on the city walls, before the armies that besieged him. He wanted the Hebrew to see the sacrifice he was about to make to the God of Abraham according to the teaching of Abraham.And then the wrath against the Israelites increased, because the calamities, which the Scripture accurately relates after these events, happened to them again. They had seen how God protected them, and the abundance of water that he had made miraculously flow for them and the retreat of their enemies before them. Nevertheless, they persisted in their dishonor, and their hearts were still attached to their calf.

[AD 373] Ephrem the Syrian on 2 Kings 3:26-27
People imitate those who do good deeds, therefore, not out of love for these good deeds but because of their usefulness. For Balaam also flattered [God], in that he had seven altars built because he had heard concerning these ancient ones that, with regard to the sacrifices they had offered to him, their prayers were accepted. The king of Moab took note of Jephthah. But, because it was his firstborn and a human being rather than an animal that he killed, God took pity on him, since it was in affliction that he did it and not through love. In the case of Jephthah, if it had been one of his servants who had been first to encounter him, he would have killed him. But, in order that people would not engage in the sacrifice of their fellow human beings, he caused his own daughter to meet him, so that others would be afraid, lest they offer human beings by vow to God.