After this Jehoshaphat king of Judah allied himself with Ahaziah king of Israel, who acted very wickedly.
2 Chronicles 20:35
Surrounding context
20:34 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.
20:35 After this Jehoshaphat king of Judah allied himself with Ahaziah king of Israel, who acted very wickedly.
20:36 And he allied himself with him to make ships to go to Tarshish, and they made the ships in Ezion Geber.