Would not — He did join with Ahaziah before this time, and before the ships were broken: for the breaking of the ships mentioned here, is noted to be the effect of his sin, in joining with Ahaziah, 2 Chronicles 20:37. And Jehoshaphat being warned and chastised by God for this sin, would not be persuaded to repeat it.
Related Commentaries of 1 Kings 22:49
1 Kings 22:49
49 Then said Ahaziah the son of Ahab unto Jehoshaphat, Let my servants go with thy servants in the ships. But Jehoshaphat would not.