Matthew Poole and continuators on 2 Kings 3:7

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 battel? and he said, I will go up: I am as thou art, my people as thy people, and my horses as thy horses .

Of which see on 1 King. 22. 4. He joyns with him in this War; partly, because the War was very just in it self, and convenient for Iehoshaphat, both in the general, that Rebels and Revolters should be chastised and suppressed, lest the example should pass into his Dominions, and the Edomites should be hereby encouraged to revolt from him, as they did from his Son; and in particular, that the Moabites should be humbled, who had with others Invaded his Land before this time, 2 Chron. 20. 1. and might do so again if they were not brought low; for which a fair opportunity was now offered to him; and partly, because Iehoram had reformed some things, and Iehoshaphat hoped by this means to engage him to proceed further in that work.