John Gill Commentary 1 Kings 22:49

"Then said Ahaziah the son of Ahab unto Jehoshaphat, Let my servants go with thy servants in the ships. But Jehoshaphat would not." — 1 Kings 22:49 (ASV)

Then said Ahaziah the son of Ahab unto Jehoshaphat
Who very probably had built some more ships on his own, having broke off his partnership with Ahaziah:

let my servants go with your servants in the ships ;
since he was refused a part in the ships themselves, he desires leave to send men aboard them to traffic for him abroad:

but Jehoshaphat would not ;
having been reproved by a prophet of the Lord, and had suffered the loss of his ships by joining with him already.