2 Chronicles 20:35

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

Cross-references

1 Kings 22:48 recounts the same shipbuilding attempt but notes the ships wrecked at Ezion Geber, explaining why the venture failed.

1 Kings 22:49 has Jehoshaphat refusing Ahaziah's offer to join the fleet, contrasting with his alliance here.