And King Jehoram went out of Samaria the same time, As soon as he came to the throne:
and numbered all Israel; who were fit to bear arms, got them together at some certain place, and mustered them, and prepared for a war with Moab, to reduce them.

The king of Israel laments their distress, and the danger they were in. He called these kings together, yet he charges it upon Providence. Thus the foolishness of man perverteth his way, and then his heart fretteth against the Lord, Proverbs 19:3. It was well that Jehoshaphat inquired of the Lord now, but it had been much better if he had done it before he engaged in this war. Good men sometimes neglect their duty, till necessity and affliction drive them to it. Wicked people often fare the better for the friendship and society of the godly. To try their faith and obedience, Elisha bids them make the valley full of pits to receive water. Those who expect God's blessings, must dig pools for the rain to fill, as in the valley of Baca, and thus make even that a well, Psalm 84:6. We need not inquire whence the water came. God is not tied to second causes. They that sincerely seek for the dew of God's grace, shall have it, and by it be made more than conquerors.

ELISHA PROMISES WATER AND VICTORY OVER MOAB. (2Ki. 3:6-24)
King Jehoram . . . numbered Israel--made a levy from his own subjects, and at the same time sought an alliance with Jehoshaphat, which, as on the former occasion with Ahab, was readily promised (1-Kings 22:4).