Amaziah was twenty-five years old when he became king, and he reigned twenty-nine years in Jerusalem. And his mother’s name was Jehoaddan of Jerusalem. He did right in the sight of the LORD, yet not with a whole heart. Now it came about as soon as the kingdom was firmly in his grasp, that he killed his servants who had slain his father the king. However, he did not put their children to death, but did as it is written in the law in the book of Moses, which the LORD commanded, saying, “Fathers shall not be put to death for sons, nor sons be put to death for fathers, but each shall be put to death for his own sin.”
Moreover, Amaziah assembled Judah and appointed them according to their fathers’ households under commanders of thousands and commanders of hundreds throughout Judah and Benjamin; and he took a census of those from twenty years old and upward and found them to be 300,000 choice men, able to go to war and handle spear and shield. He hired also 100,000 valiant warriors out of Israel for one hundred talents of silver. But a man of God came to him saying, “O king, do not let the army of Israel go with you, for the LORD is not with Israel nor with any of the sons of Ephraim. But if you do go, do it, be strong for the battle; yet God will bring you down before the enemy, for God has power to help and to bring down.” Amaziah said to the man of God, “But what shall we do for the hundred talents which I have given to the troops of Israel?” And the man of God answered, “The LORD has much more to give you than this.” Then Amaziah dismissed them, the troops which came to him from Ephraim, to go home; so their anger burned against Judah and they returned home in fierce anger.
Now Amaziah strengthened himself and led his people forth, and went to the Valley of Salt and struck down 10,000 of the sons of Seir. The sons of Judah also captured 10,000 alive and brought them to the top of the cliff and threw them down from the top of the cliff, so that they were all dashed to pieces. But the troops whom Amaziah sent back from going with him to battle, raided the cities of Judah, from Samaria to Beth-horon, and struck down 3,000 of them and plundered much spoil.
Now after Amaziah came from slaughtering the Edomites, he brought the gods of the sons of Seir, set them up as his gods, bowed down before them and burned incense to them.