8 Then Amaziah sent messengers to Jehoash[1] the son of Jehoahaz, son of Jehu, king of Israel, saying, "Come, let us look one another in the face." 9 And Jehoash king of Israel sent word to Amaziah king of Judah, "A thistle on Lebanon sent to a cedar on Lebanon, saying, 'Give your daughter to my son for a wife,' and a wild beast of Lebanon passed by and trampled down the thistle. 10 You have indeed struck down Edom, and your heart has lifted you up. Be content with your glory, and stay at home, for why should you provoke trouble so that you fall, you and Judah with you?" 11 But Amaziah would not listen. So Jehoash king of Israel went up, and he and Amaziah king of Judah faced one another in battle at Beth-shemesh, which belongs to Judah. 12 And Judah was defeated by Israel, and every man fled to his home. 13 And Jehoash king of Israel captured Amaziah king of Judah, the son of Jehoash, son of Ahaziah, at Beth-shemesh, and came to Jerusalem and broke down the wall of Jerusalem for four hundred cubits,[2] from the Ephraim Gate to the Corner Gate. 14 And he seized all the gold and silver, and all the vessels that were found in the house of the Lord and in the treasuries of the king's house, also hostages, and he returned to Samaria.

15 Now the rest of the acts of Jehoash that he did, and his might, and how he fought with Amaziah king of Judah, are they not written in the Book of the Chronicles of the Kings of Israel? 16 And Jehoash slept with his fathers and was buried in Samaria with the kings of Israel, and Jeroboam his son reigned in his place.

Matthew Henry's Commentary on 2 Kings 14:8-16

Commentary on 2 Kings 14:8-14

(Read 2 Kings 14:8-14)

For some time after the division of the kingdoms, Judah suffered much from the enmity of Israel. After Asa's time, it suffered more by the friendship of Israel, and by the alliance made with them. Now we meet with hostility between them again. How may a humble man smile to hear two proud and scornful men set their wits on work, to vilify and undervalue one another! Unholy success excites pride; pride excites contentions. The effects of pride in others, are insufferable to those who are proud themselves. These are the sources of trouble and sin in private life; but when they arise between princes, they become the misery of their whole kingdoms. Jehoash shows Amaziah the folly of his challenge; Thine heart has lifted thee up. The root of all sin is in the heart, thence it flows. It is not Providence, the event, the occasion, whatever it is, that makes men proud, secure, discontented, or the like, but their own hearts do it.

Commentary on 2 Kings 14:15-22

(Read 2 Kings 14:15-22)

Amaziah survived his conqueror fifteen years. He was slain by his own subjects. Azariah, or Uzziah, seems to have been very young when his father was slain. Though the years of his reign are reckoned from that event, he was not fully made king till eleven years afterwards.