1 In the second year of Joash son of Jehoahaz king of Israel reigned Amaziah the son of Joash king of Judah. 2 He was twenty and five years old when he began to reign, and reigned twenty and nine years in Jerusalem. And his mother's name was Jehoaddan of Jerusalem. 3 And he did that which was right in the sight of the LORD, yet not like David his father: he did according to all things as Joash his father did. 4 Howbeit the high places were not taken away: as yet the people did sacrifice and burnt incense on the high places. 5 And it came to pass, as soon as the kingdom was confirmed in his hand, that he slew his servants which had slain the king his father. 6 But the children of the murderers he slew not: according unto that which is written in the book of the law of Moses, wherein the LORD commanded, saying, The fathers shall not be put to death for the children, nor the children be put to death for the fathers; but every man shall be put to death for his own sin. 7 He slew of Edom in the valley of salt ten thousand, and took Selah by war, and called the name of it Joktheel unto this day. 8 Then Amaziah sent messengers to Jehoash, the son of Jehoahaz son of Jehu, king of Israel, saying, Come, let us look one another in the face. 9 And Jehoash the king of Israel sent to Amaziah king of Judah, saying, The thistle that was in Lebanon sent to the cedar that was in Lebanon, saying, Give thy daughter to my son to wife: and there passed by a wild beast that was in Lebanon, and trode down the thistle. 10 Thou hast indeed smitten Edom, and thine heart hath lifted thee up: glory of this, and tarry at home: for why shouldest thou meddle to thy hurt, that thou shouldest fall, even thou, and Judah with thee? 11 But Amaziah would not hear. Therefore Jehoash king of Israel went up; and he and Amaziah king of Judah looked one another in the face at Beth-shemesh, which belongeth to Judah. 12 And Judah was put to the worse before Israel; and they fled every man to their tents. 13 And Jehoash king of Israel took Amaziah king of Judah, the son of Jehoash the son of Ahaziah, at Beth-shemesh, and came to Jerusalem, and brake down the wall of Jerusalem from the gate of Ephraim unto the corner gate, four hundred cubits. 14 And he took all the gold and silver, and all the vessels that were found in the house of the LORD, and in the treasures of the king's house, and hostages, and returned to Samaria. 15 Now the rest of the acts of Jehoash which 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 stead. 17 And Amaziah the son of Joash king of Judah lived after the death of Jehoash son of Jehoahaz king of Israel fifteen years. 18 And the rest of the acts of Amaziah, are they not written in the book of the chronicles of the kings of Judah? 19 Now they made a conspiracy against him in Jerusalem: and he fled to Lachish; but they sent after him to Lachish, and slew him there. 20 And they brought him on horses: and he was buried at Jerusalem with his fathers in the city of David. 21 And all the people of Judah took Azariah, which was sixteen years old, and made him king instead of his father Amaziah. 22 He built Elath, and restored it to Judah, after that the king slept with his fathers. 23 In the fifteenth year of Amaziah the son of Joash king of Judah Jeroboam the son of Joash king of Israel began to reign in Samaria, and reigned forty and one years. 24 And he did that which was evil in the sight of the LORD: he departed not from all the sins of Jeroboam the son of Nebat, who made Israel to sin. 25 He restored the coast of Israel from the entering of Hamath unto the sea of the plain, according to the word of the LORD God of Israel, which he spake by the hand of his servant Jonah, the son of Amittai, the prophet, which was of Gath-hepher. 26 For the LORD saw the affliction of Israel, that it was very bitter: for there was not any shut up, nor any left, nor any helper for Israel. 27 And the LORD said not that he would blot out the name of Israel from under heaven: but he saved them by the hand of Jeroboam the son of Joash. 28 Now the rest of the acts of Jeroboam, and all that he did, and his might, how he warred, and how he recovered Damascus, and Hamath, which belonged to Judah, for Israel, are they not written in the book of the chronicles of the kings of Israel? 29 And Jeroboam slept with his fathers, even with the kings of Israel; and Zachariah his son reigned in his stead.
[AD 373] Ephrem the Syrian on 2 Kings 14:1-7
“In the second year of King Joash son of Ahaziah of Israel, King Amaziah son of Joash of Judah began to reign,” who avenged the death of his father, but with moderation, so that he spared the life of the relatives of the conspirators according to the prescriptions of the Law and was careful that the punishment might not be too excessive for the authors of the crime. Therefore Amaziah was pious, as long as he had before his eyes his father’s unhappy end, whose cause he could not ignore: offense against the true religion [of God]. However, when his reign began to be very prosperous, [Amaziah] rejected his fear of God which he had conceived after witnessing his father’s punishment, and embraced foreign cults. In the second book of the Annals, the Scripture relating his victory against the Edomites confirms that this was the reason of his apostasy: “But Amaziah took courage, and led out his people, and went to the Valley of Salt and smote ten thousand men of Seir. The men of Judah captured another ten thousand alive and took them to the top of a rock, and all were enchained.” And the text adds, “After Amaziah came from the slaughter of the Edomites, he brought the gods of the men of Seir, and set them up as his gods and worshiped them, making offerings to them.”

[AD 735] Bede on 2 Kings 14:7
"He struck down ten thousand Edomites in the Valley of Salt, etc." [2 Kings 14:7] It is said of Amaziah, the king of Judah: He struck down ten thousand Edomites in the Valley of Salt, and took Sela in war, and called its name Joktheel; the Valley of Salt was where they made salt, either from a spring of brine, as in many places, or by cutting, drying, and burning, or by boiling salty well waters until they solidified into salt, or by any other method by which salt is usually made. In that place, Joab is also recorded to have struck down twelve thousand Edomites. It must also not be overlooked that the old edition, for the Valley of Salt, placed Gemelach, as if it were the name of a region. Petra, however, is a noble city of Arabia, in the same land of Edom, which in the Book of Numbers is called Rekem, and by the Syrians today is still called thus (Num. 31). Joktheel, which Amaziah as victor gave it as a name, is interpreted as the assembly of God, or the help of God, acting faithfully so that it would be recorded for perpetual memory, because he took it either with the assembly of the people of God or with God's help.

[AD 850] Ishodad of Merv on 2 Kings 14:8-9
The thorn bush [mentioned here] is a tiny plant and herb and is not the blackberry bush, [whose fruits] we eat. “Since, if ever,” he says, “the thorn bush were sent to a cedar, saying, ‘Give your daughter to my son for a wife,’ it would be an insult and an act of derision, since the thorn bush is much smaller than the cedar, so you, Amaziah, do not differ at all from the thorn bush, if compared with my power.” By the cedar and the wild beast Jehoash signifies himself.

[AD 1781] Richard Challoner on 2 Kings 14:8
Let us see one another: This was a challenge to fight.
[AD 430] Augustine of Hippo on 2 Kings 14:10-14
The Almighty, who cannot possibly will anything unjust, is able to set in motion even the inclinations of their will in people’s hearts in order to accomplish through these people whatever he wishes to achieve through their agency. What meaning can these words have that the man of God addressed to King Amaziah: “Do not allow the army of Israel to go out with you, for the Lord is not with Israel and all the children of Ephraim. And if you think to prevail over them, God will put you to flight before your enemies; for it belongs to God both to help and to put to flight”?How does the power of God help some in war by giving them confidence and turns others to flight by instilling them with fear, except for this reason, that he who has made all things as he willed in heaven and on earth, also works in the human hearts? We also read of what Joash, king of Israel, said when he dispatched a messenger to King Amaziah, who had a mind to go to war with him. Having mentioned certain things, he went on to say, “Sit at home. Why do you provoke evil that you should fall and Judah with you?” The Scripture then went on to add, “And Amaziah would not listen to him because it was the Lord’s will that he should be delivered into the hands of enemies because he sought after the gods of Edom.”
There you see how God, wishing to punish the sin of idolatry, influenced the heart of this man with whom he was justly angry, that he would not heed salutary advice but, in his contempt for it, would engage in battle, there to perish together with his army.

[AD 373] Ephrem the Syrian on 2 Kings 14:23-26
“In the fifteenth year of King Amaziah son of Joash of Judah, King Jeroboam son of Joash of Israel began to reign in Samaria; he reigned forty-one years. He restored the border of Israel from Lebo-hamath as far as the Sea of the Arabah, according to the word of the Lord, the God of Israel, which he spoke by his servant Jonah son of Amittai, the prophet.” This is the same Jonah who preached the repentance of Nineveh. And the Sea of Arabah is the same that the Scripture calls elsewhere the “salt sea,” situated on the border with Canaan, of which the city of Hamath, beside the Mount Lebanon, is the other northern border. Jeroboam honored the prophet Jonah as his father had honored Elisha and recurred to his useful work, so that, being encouraged by his predictions and advice, was able to conquer back the cities occupied by the Syrians.

[AD 735] Bede on 2 Kings 14:25
"He restored the boundaries of Israel from the entrance of Hamath, etc." [2 Kings 14:25] It is said of Jeroboam, king of Israel: He restored the boundaries of Israel from the entrance of Hamath to the sea of the Arabah. Hamath, which is now called Epiphania, was the northern boundary of Israel. However, the sea of the Arabah, which in Hebrew is called Araba, designates the Dead Sea, which in length extends for 580 stadia to Zoaras of Arabia, and in width for 150 stadia to the nearby Sodoms.

[AD 1781] Richard Challoner on 2 Kings 14:25
Opher: The tribe of Zabulon.