5 But when Ahab was dead, the king of Moab got free from the authority of the king of Israel.

6 At that time, King Jehoram went out from Samaria and got all Israel together in fighting order. 7 And he sent to Jehoshaphat, king of Judah, saying, The king of Moab has got free from my authority: will you go with me to make war on Moab? And he said, I will go with you: I am as you are, my people as your people, and my horses as your horses.

Matthew Henry's Commentary on 2 Kings 3:5-7

Commentary on 2 Kings 3:1-5

(Read 2 Kings 3:1-5)

Jehoram took warning by God's judgment, and put away the image of Baal, yet he maintained the worship of the calves. Those do not truly repent or reform, who only part with the sins they lose by, but continue to love the sins that they think to gain by.

Commentary on 2 Kings 3:6-19

(Read 2 Kings 3:6-19)

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, 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.