31 So Jehoshaphat was king over Judah. He was thirty-five years old when he became king, and he reigned twenty-five years in Jerusalem. His mother's name was Azubah the daughter of Shilhi. 32 And he walked in the way of his father Asa, and did not turn aside from it, doing what was right in the sight of the Lord. 33 Nevertheless the high places were not taken away, for as yet the people had not directed their hearts to the God of their fathers. 34 Now the rest of the acts of Jehoshaphat, first and last, indeed they are written in the book of Jehu the son of Hanani, which is mentioned in the book of the kings of Israel. 35 After this Jehoshaphat king of Judah allied himself with Ahaziah king of Israel, who acted very wickedly. 36 And he allied himself with him to make ships to go to Tarshish, and they made the ships in Ezion Geber. 37 But Eliezer the son of Dodavah of Mareshah prophesied against Jehoshaphat, saying, "Because you have allied yourself with Ahaziah, the Lord has destroyed your works." Then the ships were wrecked, so that they were not able to go to Tarshish.
Matthew Henry's Commentary on 2 Chronicles 20:31-37
Commentary on 2 Chronicles 20:31-37
(Read 2 Chronicles 20:31-37)
Jehoshaphat kept close to the worship of God, and did what he could to keep his people close to it. But after God had done such great things for him, given him not only victory, but wealth; after this, to go and join himself with a wicked king, was very ungrateful. What could he expect but that God would be angry with him? Yet it seems, he took the warning; for when Ahaziah afterward pressed him to join him, he would not, 1 Kings 22:49. Thus the alliance was broken, and the Divine rebuke had its effect, at least for a season. Let us be thankful for any losses which may have prevented the loss of our immortal souls. Let us praise the Lord, who sought after us, and left us not to perish in our sins.