Jehoash succeded his father Jehoahaz to become the twelfth king of Israel. Although he did not break the evil pattern of Israel's kings, he showed some bright spots. He honored the prophet Elisha, even weeping by his bedside when he was dying, addressing him in the words that Elisha himself had used when Elijah was carried up into heaven: "O my father, my father, the chariot of Israel and the horsemen thereof." For this and for other reasons, God allowed him to recover much of the territory that Aram (Syria) had taken from Israel.
Later, he was involved in war with Amaziah, the king of Judah, whom he utterly routed.
Jehoash king of Israel captured Amaziah king of Judah, the son of Joash, the son of Ahaziah, at Beth Shemesh. Then Jehoash brought him to Jerusalem and broke down the wall of Jerusalem from the Ephraim Gate to the Corner Gate-a section about six hundred feet long. He took all the gold and silver and all the articles found in the temple of God that had been in the care of Obed-Edom, together with the palace treasures and the hostages, and returned to Samaria.
(2 Chr. 25:23-24)
He was succeeded by his son Jeroboam II.