2 Chronicles 25 recounts the reign of King Amaziah of Judah. The chapter begins by describing his ascension to the throne at the age of 25 and his adherence to the Law of Moses, unlike his father. Amaziah prepares to go to war against the Edomites and assembles a powerful army, but decides to hire a hundred thousand mercenaries from Israel. However, a prophet warns him that God is not with the Israelite soldiers and advises him to dismiss them, which Amaziah reluctantly does.
Despite this setback, Amaziah leads Judah's forces into battle against the Edomites and emerges victorious, killing ten thousand Edomite soldiers. He also captures ten thousand more as prisoners. However, when he brings back idols of the defeated Edomites and begins to worship them, a prophet rebukes him for abandoning the Lord and warns of impending destruction.
Amaziah ignores the prophet's warning and challenges Joash, the king of Israel, to battle. Joash responds with a parable, advising Amaziah to stay home and enjoy his own kingdom rather than provoking unnecessary conflict. However, Amaziah refuses to listen and goes to war against Israel. The battle ends in defeat for Judah, with Amaziah being captured, Jerusalem being breached, and its walls torn down.
Ultimately, Amaziah is brought back to Jerusalem but is assassinated by his own people. The chapter concludes with a summary of his reign and burial. The story of Amaziah serves as a cautionary tale about the consequences of pride, disobedience to God's commands, and seeking alliances with ungodly nations.