And after this did Jehoshaphat king of Judah join himself with Ahaziah king of Israel, who did very wickedly:

Wesley's Notes

20:35 After this - This is mentioned as an aggravation of his sin, after so great an obligation laid upon him by God; and after he had been so singularly reproved by a prophet yet he relapsed into the same sin which proceeded partly from that near relation which was contracted between the two families, and partly from the easiness of Jehoshaphat's temper, which could not resist the solicitations of others, in such things as might seem indifferent. For he did not join with him in war, as he did with Ahab, but in a peaceable way only, in a matter of trade and commerce. And yet God reproves and punisheth him for it, ver.37, to shew his great dislike of all familiar conversation of his servants and people with professed enemies of God and of religion, as Ahaziah was. Very wickedly - Or who did industriously, and maliciously, and constantly work wickedness, as the Hebrew phrase implies, giving himself up to idolatry and all wickedness.

Jamieson-Fausset-Brown Bible Commentary

35-37. after this did Jehoshaphat . join himself with Ahaziah . to make ships-A combined fleet was built at Ezion-geber, the destination of which was to voyage to Tartessus, but it was wrecked. Jehoshaphat's motive for entering into this partnership was to secure a free passage through Israel, for the vessels were to be conveyed across the Isthmus of Suez, and to sail to the west of Europe from one of the ports of Palestine on the Mediterranean. Eliezer, a prophet, denounced this unholy alliance, and foretold, as divine judgment, the total wreck of the whole fleet. The consequence was, that although Jehoshaphat broke off-in obedience to the divine will-his league with Ahaziah, he formed a new scheme of a merchant fleet, and Ahaziah wished to be admitted a partner [1Ki 22:48]. The proposal of the Israelitish king was respectfully declined [1Ki 22:49]. The destination of this new fleet was to Ophir, because the Israelitish seaports were not accessible to him for the Tartessus trade; but the ships, when just off the docks, were wrecked in the rocky creek of Ezion-geber.

Matthew Henry's Concise Commentary

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, 1Ki 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.

Matthew Henry's Whole Bible Commentary

Verses 31-37

We are now drawing towards the close of the history of Jehoshaphat's reign, for a further account of which those who lived when this book was published were referred to an authentic history of it, written by Jehu the prophet (ch. 19:2), which was then extant, v. 34. This was the general character of his reign, that he did that which was right in the sight of the Lord, kept close to the worship of God himself and did what he could to keep his people close to it. But two things are here to be lamented:-1. The people still retained a partiality for the high places, v. 33. Those that were erected to the honour of strange gods were taken away (ch. 17:6); but those where the true God was worshipped, being less culpable, were thought allowable, and Jehoshaphat was loth to disoblige the people so far as to take them away, for as yet they had not prepared their hearts to serve the God of their fathers. They complied with Jehoshaphat's reformation because they could not for shame do otherwise, but they were not hearty in it, did not direct their hearts to God in it, did not act in it from any good principle nor with any zeal or resolution: and the best magistrates cannot bring to pass what they would, in reformation, when the people are cool in it. 2. Jehoshaphat himself still retained a partiality for the house of Ahab, because he had married his son to a daughter of that family, though he had been plainly reproved for it and had like to have smarted for it. He saw and knew that Ahaziah, the son of Ahab, did very wickedly, and therefore could not expect to prosper; yet he joined himself with him, not in war, as with his father, but in trade, became his partner in an East India fleet bound for Ophir, v. 35, 36. There is an emphasis laid upon the time-after this, after God had done such great things for him, without any such scandalous and pernicious confederacies, given him not only victory, but wealth, yet after this to go and join himself with a wicked king was very ungrateful. After God had given him such a deliverance as this should he again break God's commandments, and join in affinity with the people of these abominations? What could he expect but that God should be angry with him? Ezra 9:13, 14. Yet he sends to him, to show him his error and bring him to repentance, (1.) By a prophet, who foretold the blasting of his project, v. 37. And, (2.) By a storm, which broke the ships in the port before they set sail, by which he was warned to break off his alliance with Ahaziah; and it seems he took the warning, for, when Ahaziah afterwards pressed him to join with him, he would not, 1 Ki. 22:49. See how pernicious a thing it is to join in friendship and society with evil-doers. It is a hard matter to break off from it. A man may much better keep himself from being taken in the snare than recover himself out of it.