Midrasch zu Könige II 3:13

6 Another interpretation (of Numb. 25:17) “Harass the Midianites”: Since I have written (in Deut. 20:19), “When you besiege (rt. tswr) a city a [long time] […], you shall not destroy its trees,” in the case of these (i.e., Moab and the Ammonites) you shall not do so. On the contrary, their trees you shall destroy. And so you find that when Joram king of Israel, Jehoshaphat king of Judah, and the king of Edom went to fight with Moab, (according to II Kings 3:9) “they circled around on a seven-day march, so that there was no water for the army or for the animals that were with them.” They began to weep, and (according to vs. 10) “The king of Israel said, ‘Alas, for the Lord has summoned these three kings to give them into the hand of Moab.’” Jehoshaphat answered (in vs. 11), “Is there no prophet of the Lord here through whom we may inquire of the Lord […]?” [This passage is] to make known the wickedness of Joram, in that he did not acknowledge Him, but rather only Jehoshaphat acknowledged Him. (Vs. 12) “Then Jehoshaphat said, ‘The word of the Lord is with him’; so the king of Israel, Jehoshaphat, [and the king of Edom] went down unto him”: Why is Jehoshaphat not called a king here? In order to make known the humility of that righteous man, in that he did not want to go down before the prophet in royal garb, but as a commoner.⁸Gk.: idiotes. But some say, “[It was] because an edict had been decreed that he would be killed with Ahab that the scriptural text has reckoned [the reign of] his son from that hour. For that reason ‘king’ was not written.” But as a reward for their going down to the prophet, they attained the right to see all those miracles. When the king of Israel saw Elisha, Elisha said to the king of Israel (according to vs. 13,) “What have I to do with you; go unto the prophets of your father and unto the prophets of your mother,” as he never asked him [anything] all of his days. He began to implore him, (as in ibid., cont.) “And the king of Israel said to him […].” (Vss. 14-17) “Elisha said, ‘As the Lord of hosts lives […]. Now then get me a musician […].” He gave them the water that they needed. Moreover, he said to them “The Moabites shall fall into your hands, (in vs. 19) ‘thus you shall smite every fortified city and every choice city, [you shall also fell every good tree].’” They said to him, “[But] the Holy One, blessed be He, said (in Deut. 20:19), ‘You shall not destroy its trees’; yet you are saying [to do] so.” He said to them, “He gave the command with reference to the rest of the nations, but this one is insignificant and contemptable,” as stated (in II Kings 3:18), “This one is insignificant in the eyes of the Lord, so He will give Moab into your hands.” It is [also] stated (in Deut. 23:7), “You shall not seek their welfare and benefit (literally, their good).” [That is referring to] the good trees. It is therefore stated (in Numb. 25:17), “Harass the Midianites.”